Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e01c8eca505398…

MALICIOUS

PDF

87.0 KB Created: 2021-02-21 09:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 083cea782ec9d196471ab22895346926 SHA-1: f2111748a76e9c0816fdf627e18d2250b9a8782a SHA-256: 26e01c8eca50539883a6f3187d4a7fdb41962b1152ab25c56ebe2a1c7cfe8c25
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for SEO manipulation or to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attack pattern involving redirection to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=the+lost+steps+alejo+carpentier+pdf PDF link annotation
    • https://nubenitenaw.weebly.com/uploads/1/3/4/0/134016689/xoxadim.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/yQiizOH/83891731058.pdfIn PDF document text
    • http://kukushka.space/17835270751n8t2y.pdfIn PDF document text
    • https://dizegovonaziluz.weebly.com/uploads/1/3/4/8/134881707/sekanojosa-tusajidet.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/2968948.pdfIn PDF document text
    • https://sisemukogonutop.weebly.com/uploads/1/3/4/2/134266332/lazopugepozef-mowimibamenozoj-tiduke.pdfIn PDF document text
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/e1ea2ebd9.pdfIn PDF document text
    • https://vumopofusub.weebly.com/uploads/1/3/0/8/130874587/kakokevofefexi_luzagebafezuga.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/0YxIihg/dragon_raja_anecdote_voice_bond.pdfIn PDF document text
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/pizareputowipak-viratapabos-diloxazuga.pdfIn PDF document text
    • https://fubediko.weebly.com/uploads/1/3/1/0/131070718/8255524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_6022b3fb794ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5ff29e86315a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488855/normal_600a15483add0.pdfIn PDF document text
    • http://about-igsupport.com/7970469168838p2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kixixiwibatogit.epizy.com/the_austere_academy_weebly.pdfIn PDF document text
    • http://lujolugajejizog.epizy.com/auditoria_informtica_de_comunicacin_y_redes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 5268 bytes
SHA-256: 856da71be51a9de20ebde36c8702777f515a975e4ae2ab0d8c8517c8a80464ec
font_01_sfnt_off00011456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11456 10636 bytes
SHA-256: ff82a38b5fc7071451232cc74d7c56bf0c4fe3c347d52110ddb8afc8b00cc179
font_02_sfnt_off00013826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13826 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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