Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae8549efb9a3373…

MALICIOUS

PDF

83.8 KB Created: 2021-03-09 16:24:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f39800e7e9e68e38e886825c5cfa6a63 SHA-1: b27dd52b4fa417c16926f51caa6573908821a27a SHA-256: fae8549efb9a3373511b7497ea36dcdad7177a0c5c14108bfbe9646efe381484
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

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://lozipotod.ru/award?keyword=agriculture+in+east+africa+pdf PDF link annotation
    • https://cdn.sqhk.co/daladovum/d6qxbhf/adverb_form_of_environment.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/bell_hooks_feminist_theory_from_margin_to_center_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_6012d480378e3.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/how_to_add_reviews_on_wix_website.pdfIn PDF document text
    • https://cdn.sqhk.co/lelabepena/bxtgSYs/download_beautiful_nature_wallpapers_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/dgfIUhe/top_sports_topics_today.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/ididjig/13132705875.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/WztTjgC/monkey_king_demon_battle_apk.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/xemenibotowumaxugu.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/Ihb7wkd/dovodile.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/88007345982.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/tablet_weaving_patterns_viking.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ff42cfd9750c.pdfIn PDF document text
    • https://cdn.sqhk.co/panazomuv/cjghbFE/48934021381.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
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_d25b287d1c3748c2a33d919858052d33.pdf?index=trueIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_30c592e6443a4797b19ab60d04531537.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_1c028d51d4524e77aa7e07a22c20750a.pdf?index=trueIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_1c3762a0a0384e1baa5d976ca71dd8c6.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_82ff1cfbcf9a406eaad1e949c631f13b.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7B 5084 bytes
SHA-256: ff22cdfc7164cabc833586806afcea0ac0b073b7aaef1ce30e485f5aafe50f57
font_01_sfnt_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 10688 bytes
SHA-256: c538300f34a0bab0e0b7d057a948f55137274339bca5941a0e9d6fc2a8965734
font_02_sfnt_off0001334f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176