Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9c2c7f296c84d4…

MALICIOUS

PDF

87.3 KB Created: 2021-03-14 21:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1b04618b1a89bc2532e19a9552682605 SHA-1: 48aebd98b5418ecacc3ab1b5fe28c96faf9fb851 SHA-256: ae9c2c7f296c84d44ca58927d45cbcbe7c640e655f109425b63fbb7db68c59d2
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on low-reputation hosting. While no scripts were explicitly extracted, the presence of embedded URLs suggests a phishing or malware distribution attempt, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=xerox+7845+fuser+system+error PDF link annotation
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/noraje.pdfIn PDF document text
    • https://cdn.sqhk.co/gavivevok/VQmgija/bowanuseketiburonejitewe.pdfIn PDF document text
    • http://slimitalia.space/pupegon5ir.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/disosalemoju-kivifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_602907bb67b17.pdfIn PDF document text
    • http://lipuwisapi.mywebcommunity.org/bobina_de_tesla_historia.pdfIn PDF document text
    • https://bipasomuted.weebly.com/uploads/1/3/6/0/136010989/gibesinunud-tozegutelalojo-bodezezaxat-zonalerebadu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5fe4edad582c3.pdfIn PDF document text
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/dowusaroje.pdfIn PDF document text
    • https://bapepewemeg.weebly.com/uploads/1/3/4/7/134702997/3846704.pdfIn PDF document text
    • https://luzusuzure.weebly.com/uploads/1/3/0/7/130775685/7460296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459057/normal_600b1c4a563ba.pdfIn PDF document text
    • http://sun-italy.space/where_to_buy_toyota_techstream_softwareuwm87.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/jgdfhi0/8734320519.pdfIn PDF document text
    • https://pulisojoperun.weebly.com/uploads/1/3/4/4/134487891/wofurapuna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcea1f485f21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fuvuvadut.onlinewebshop.net/pabewizozemujijita.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/64691608190.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/81748289253.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 5032 bytes
SHA-256: 6520b5f5de5c492e7e138e8cb60d06276161a5b4db13fdb38907c53070b665fe
font_01_sfnt_off0000fbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 17936 bytes
SHA-256: cc25ae8167f8828af2c08308306ed9f7be48b1f248a9f1c14d9958fbda5a10d5
font_02_sfnt_off00012a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3D 16232 bytes
SHA-256: dd9c1580cc8bbac4d2bb14da0750e7e6245c4d048414ed483dffdcf1b78f1b1e
font_03_sfnt_off00013f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F93 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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