Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ab23382a59691f…

MALICIOUS

PDF

88.6 KB Created: 2021-07-07 14:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5a82fded90bec44cde166aa3b2d417f SHA-1: c82f96fca4e9c5ba5ce34578b752f40625059185 SHA-256: 61ab23382a59691f575adee49629fdbc151f7b0e84cbe15f7436bd060d00a2fd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, aiming to deceive users into visiting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://alibabashipping.com/userfiles/file/2104553554.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609062cc43cda---lifizutakelos.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/ajg3opmvtnq3frr6eeouejo32c/jenamago.pdf
    • http://ukrainski-rosyjski.pl/userfiles/file/nadigipibex.pdf
    • http://kinel-hunter.ru/upfiles/file/86393392889.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/74ea6dd47ceda136365003ca21d3f049/xuxipuserebos.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/j0bu7ai3v193god2ocuatj7lk5/6216358743.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6215596e3---fizopowovakar.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/533894ec525fafdd0c532da58aa6fde5/59451140205.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fc36d8476---11364339338.pdf
    • http://absolutelyneon.com/userfiles/file/8984519134.pdf
    • https://baohohoanglong.com/userfiles/file/86496576178.pdf
    • http://ibb-online.ru/f/file/16047455858.pdf
    • http://all-pass.com/folder/editor/file/44418540012.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/708269091124267840e43fead248a120/40558408602.pdf
    • http://sbox-technology.com/upload/datoteke/72668858164.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160708c3097093---58630118000.pdf
    • http://bagiez.de/userfiles/file/37209507621.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/7fd4ppe6u0j8mfkif0mmu0b8f8/49975932841.pdf
    • http://renovator.cz/files/file/suxug.pdf
    • http://piau-po21inn.com/CKEdit/upload/files/fuxidasireverulurolebibod.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/20235b5d49f9128ca07070679bf1f954/68031779383.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=scriptures+on+the+light+of+god
    • 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_off0000f46a.bin
6a916ba3dd36b4967a3ee82c603c214dc89613f25832d946aab46297f987ae1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 10912 bytes
font_01_sfnt_off00010d57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 16792 bytes
font_02_sfnt_off00012569.bin
4d7b4c0546e64f9295bb642d47a24becca65c8e820f6f4afafe2d00cec5d0883
pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 18780 bytes