Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bc4bd912752714…

MALICIOUS

PDF

116.5 KB Created: 2021-09-06 15:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0486630052e161366d4c73d183e2f764 SHA-1: af2ae15d1384098689ce90ad1222da2a43dd313d SHA-256: 80bc4bd912752714fca293ab075c3e6229a07c79da64d2714fd6dcddd15625f0
196 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The heuristics indicate it is an advance-fee scam lure, likely intended to trick users into believing they are receiving a prize or parcel. The document contains numerous links to external PDF files hosted on various domains, suggesting a link farm designed to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://franchise-vietnam.com/app/webroot/img/files/48229396487.pdf
    • http://edu-tur.ru/userfiles/file/52600870758.pdf
    • http://ewhamd.net/upFiles/ckeditor/files/70255189548.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/73pm6qd0l2uuhupiddt4oh9rr0/8704085615.pdf
    • http://morgancountyoh.com/userimages/nulowemofifumoduj.pdf
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dimesedajufunagel.pdf
    • http://cpghollywood.com/userfiles/files/fadolokage.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/d52db413586740f75c21468e9032e83c/misaxitexakiviruvitigawu.pdf
    • http://skikk.be/app/webroot/files/userfiles/files/85777773911.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/5hbrvprn995lh7rfjjsiifih9f/34393586618.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a0a80394f---71212963542.pdf
    • http://canadianartistic.com/userfiles/file/74234768662.pdf
    • http://babyindex.nl/images/uploads/magozalisik.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/68c39e3ee4f865d1d3caef44ba48a063/84351214637.pdf
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/binazo.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/gtk56laebam2a78kmip267gujs/30090318206.pdf
    • http://abwjefferson.com/uploads/files/13529627346.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160803ab222a4a---wakudezelilipaxewe.pdf
    • https://aawyx.com/sites/default/imageuser/file/pevekuvikegixupa.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f403d416ed---3153792100.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2e7ce65a004eaa4515d0cb06eaa4454d/kowulozaj.pdf
    • http://sungwoneng.com/upfile_editor/2021/files/38368761786.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a556e6a0ca6---zujefobir.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46f676be61---podebezedokote.pdf
    • https://www.avantagesapp.com/uploads/files/ranudokuwimipo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=porous+media+pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015fcc.bin
7deef23639f3d1c6772b09b8a88e2c40e6e30a0505c2f009c090fd98100d7330
pdf-font-stream PDF embedded font (sfnt) at offset 0x15FCC 10512 bytes
font_01_sfnt_off000177bd.bin
a215ce6e2e4fcb0eb618316a8a2329e7305166bab1ac3a9b4ff6e1458aac17c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x177BD 20020 bytes
font_02_sfnt_off0001ac5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC5A 16792 bytes