Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87ccf1df440aff9…

MALICIOUS

PDF

157.8 KB Created: 2021-07-19 06:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be14b1b7a3fa7a50fb5d0dac4c548a9a SHA-1: f29b31d94889692ac9cc8bf4cfc868745f6e8119 SHA-256: d87ccf1df440aff94458a1f68479cc41b779ee87a87c77a5afd74cbb701095ff
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1554 Interfering with Security Tools

This PDF file was flagged by ClamAV as a phishing trojan. Heuristics indicate it contains an advance-fee scam lure, prompts the user to disable security software, and includes a download button. The document body is unreadable, but the presence of multiple links to compromised CMS upload storage and disposable hosting suggests a malicious distribution infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9674

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd8a8e08e7---govupepurirugeneso.pdf
    • http://wsp.pl/userfiles/file/88960313683.pdf
    • http://tuzvedo.hu/elemek/file/22404983769.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dfb1bc566---nuxuputip.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609661618dc15---76110616980.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/3f1c1b999782d66d1841436c9c796f5e/72272947915.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/26a2e439f624b6c96ef35c2d66529207/96653538114.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086789c6a379---81808779563.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606f920062f7c---53286586257.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce488c2d72---volasudureguturotuxi.pdf
    • http://okfilm.kr/userData/board/file/kirerawibemujedi.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/kk891q27nmpiv40ns25bee7tcj/41998960926.pdf
    • http://deryalvincotokurtarma.com/userfiles/file/xagixuvizufewebojofuv.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/d8b0d5df45055dc5bce1f2fe1bfba883/23238111357.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4c283ace0---33584818308.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8sdctr8gckj4f79jla3m57rhm4/dewivu.pdf
    • https://coonvalleycc.com/userfiles/file/1905105013.pdf
    • https://aronabritcan.com/userfiles/file/87410987443.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985271d06d0---bojadi.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed69a9e341---zezudobafexefibawivel.pdf
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/xujemivovokutovixone.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da79279ed82---gesaboka.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=level+7+script+executor+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cb9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB9D 16792 bytes
font_01_sfnt_off0001e3af.bin
8ca857fc7e27dd7e8044f0097038b40b460fb79ccaa005165da0e57f25ea2416
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3AF 19716 bytes
font_02_sfnt_off000217a4.bin
35ca54f0e46fb69fd3594d659ab9a7862bb47d20d50707fa48eee44f06862ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0x217A4 10972 bytes
font_03_sfnt_off00023155.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0x23155 16140 bytes
font_04_sfnt_off000246c8.bin
031e161dc4e6fe6028666bee9f52c4d5e6d49ce14a2c1380d7477a970964d355
pdf-font-stream PDF embedded font (sfnt) at offset 0x246C8 9572 bytes