Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f49da7a03bc4fd2…

MALICIOUS

PDF

69.9 KB Created: 2021-05-19 00:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d317ce73e9548838a1904f1ab723ec6b SHA-1: 7f02d7a97bb52e9d38678650bbea87b3e0484791 SHA-256: 7f49da7a03bc4fd2b561d66ed15909eec7ecee3b340b0d5eebe1608665f2cc90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's designed to redirect users to malicious content or downloads. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://app8itebarandgrill.com/admin/images/file/27009494014.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083640d207f8---gigaxamijipupereresejasal.pdf
    • http://www.findvoters.com/userfiles/file/juranolesin.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/ob40gbmjj78pujh0qv8fpvec1j/39066710793.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/5a10c1e6ea56742249992d82c617dab9/7347362829.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/a62716c4d3de5819e87fea297c88c2f5/pitevu.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/6bfb10ad53d0ef7e3cfe7b7ce920de09/73773843220.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/av1dee9p8sdgmiqi76oj7i53n6/dezuximixowolug.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16086c8e355a01---zezuvilivakal.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609e634360017---tazeziteladofaremege.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e1f776fb9---nunegobibidokopisawim.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607507572024c---22611059156.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/4f2be7e5e820a32008fb2c2d4b4824ff/6149446560.pdf
    • http://allprintusa.com/admin/images/file/14988628519.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=muslim+pro+premium+apk+11.3.4
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d451.bin
55e4b717649e704532854ef9624ef97da5c0218aaab0ae176a724ba4061abb43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD451 5368 bytes
font_01_sfnt_off0000e693.bin
5c3d30d3b405128d729230b20c6f9e3a345fb8710253f450b1176f09a2a2f7dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 10720 bytes

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