Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84da98a1cc78ccb…

MALICIOUS

PDF

79.0 KB Created: 2021-06-24 20:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8d6fb6389b980a75bb04e39558b9acc SHA-1: bc77a33a90eed58c987554a6c22f4581cdd58d48 SHA-256: a84da98a1cc78ccb8d861299e8fe8a4107eddf41d3f5de70a4e47aebbbf15969
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple compromised websites hosting further malicious PDFs. This pattern suggests an attempt to distribute malware or conduct phishing operations by leveraging a network of compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/8f31abbd73e83247f13aa598076e6fbb/63603815718.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e4068db8---89719090283.pdf
    • https://akproauto.com/nbloom/fckuploads/file/ginaxabujixapemewi.pdf
    • http://border-inn.com/CKEdit/upload/files/68199878720.pdf
    • https://agrimal.pl/userfiles/file/visikajaziwokuxetove.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23bb422a13---nonideresup.pdf
    • https://himalayanwanderer.com/himalayan/userfiles/files/82886460765.pdf
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/sof6a2p17pbgbvrs8kl40vf35l/93434403042.pdf
    • https://louvre.lv/res/wysiwyg/file/32217999608.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/mtirlddv70jige1m7c3o1ak8gt/zujuxomuwudekogeka.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05378664db---nizolarumefixefowitizuso.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c368d6a0b6d---newamimogat.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16077c886049ef---85718320034.pdf
    • http://carrozzeriardue.it/userfiles/files/71682435867.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607403ef92f2b---58027603453.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ae19c8126a23c16e1b9e8af3695e8b59/sasakanodosawatibe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=isaca+cisa+requirements
    • 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://scripts.sil.org/OFL
    • 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_off0000e098.bin
a2f0e8b6f3f2f336d50faa480d1c455ecad7d9d4948fb138c43d9895bf30b6ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 4976 bytes
font_01_sfnt_off0000f170.bin
e0a85ba5ad2ef96924b6b65c17d847587f801523ac60827b079c48397c71b1ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 11296 bytes
font_02_sfnt_off0001181c.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 16204 bytes