Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0e79f1e9912cd1…

MALICIOUS

PDF

86.6 KB Created: 2021-08-16 03:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5422156b88a47e4b1a424c5bfaf09b0c SHA-1: 6e0b64d3eb85ec411dd84242d3b888625b818609 SHA-256: 1c0e79f1e9912cd1348716cbd6738bb7ac8d4d885babd93a0326a4a053eea3cd
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/vaofg1kh72ef7e07u0m7rr2ijj/kotasenekefeseri.pdf In PDF document text
    • http://www.olivier-frey.ch/user/web/file/vefutepatipezak.pdfIn PDF document text
    • http://wohntraumgmbh.at/fupumaguxawarise.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/76f450aa115d021c261b32938972da9c/39863838090.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f517561555---razumetemiribaluzi.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c02eae2bae7---80397038316.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/votajida.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/0a2d712c78e426e2e66bb042b3bf9695/zizimuvajagiv.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/gobagadamakutamov.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/53095719516.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ff933756f---70719955897.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-3/20210503075432229008.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/d8a19be07ec536b5efa2a468b9530fd3/78411854220.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c141daf41e8125e2dc6d04f3b487d17e/mofebemeromaxumedet.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/lexupulumozepi.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c4485d82c---vipibimisejo.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/766647188.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdddc2031b---89470180909.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/47702819289.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e788bb5d8f---fetipegez.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/wiwewu.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/36382999066.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/2840896930.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/kufaxafafitid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=d-link+ip+camera+dcs-932l+softwarePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 11452 bytes
SHA-256: 3a2281df19429ce878e50e88025f7bb367fda95a9771725787c68a4ca8ac3efa
font_01_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 22888 bytes
SHA-256: 9e7eac5454df043288b08b5b0420d75e410885e04ae664a3aebf22017636431a