Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3fa646a3ba81d8…

MALICIOUS

PDF

185.3 KB Created: 2021-07-14 04:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2d5d6fc3928a0664c56ba51635261455 SHA-1: c3bb7f574566e85f3f04912c902216dc4ef60f04 SHA-256: 2a3fa646a3ba81d8d298e0e911d122a5650c453cf598f82c5364734d27b0256f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1204.002 Malicious Link

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing and trojan delivery mechanism. It contains a link farm pointing to various PDF files hosted on compromised or disposable domains, impersonating the brand 'Apple' to deceive users. The primary goal appears to be credential phishing, leveraging a lure of urgency to prompt users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9830

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=playerunknown%27s+battlegrounds+more+like+this.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://weorderfood.com/uploads/files/2750542562.pdf In PDF document text
    • http://adamlegal.com/userfiles/file/19202193129.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/64911260887.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/7987dd6d1923bce69e703a4dc8c815ba/lotufalamigeweka.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f193cf38a6---timip.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e9627cff---85085139109.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2f8995e4c---50363875631.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/3ed9fcb2271254c4ac28717a27e03a17/80273175180.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c871deb3f6f---18151743522.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/8f20ff1cb6db216a1f62d44ebb6aee68/bumidasudoromepokile.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/af4036bba9e59ccbf54d1b1ce0d9545f/49696112437.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce84e8688f---liwudepifixobumekujita.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/gadalekotifoz.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/63033686399.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///subederizulimo.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ff3b8acfa7ba13c9c524ca503ee976e/81286352933.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3643c92b01---bovapovujivujokadit.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e4e9d2cbc---19603434926.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/smc35k3k3nl53em9osfg0n6n03/97594735136.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/36740609913.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/41544304736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=playerunknown%27s+battlegrounds+more+like+thisPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A86 11264 bytes
SHA-256: 2702d2f41dee4896fd7d53537ec518baf9ab89acb2f85c53b6367601f568a42c
font_01_sfnt_off000284b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x284B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00029ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29CCB 18696 bytes
SHA-256: 1a59c81e13057ced71334f5327db44d2aa900ea4061f086ce62e2af18bc2623a
font_03_sfnt_off0002ce8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE8D 1760 bytes
SHA-256: 478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24