Malicious PDF — malware analysis report

Static analysis result for SHA-256 841b758e1a979261…

MALICIOUS

PDF

75.3 KB Created: 2021-05-01 00:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 948ffc8df0bf82efc938f3952431383e SHA-1: b80d8e314aa12e9fb66d794bcc4537e3395c8262 SHA-256: 841b758e1a9792612c7c39dc344b986f5aaf8f9b39138708b49ffc9027d4bffc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://fokemale.ru/strik?utm_term=spelljammer+5e+adventure PDF link annotation
    • https://cdn.sqhk.co/befozaxulot/4aSKKdn/english_stories_books_offline_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/6Z5OhfM/gowokezemulatusuf.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/776cffa33dd6d1.pdfIn PDF document text
    • https://pamokevavazodo.weebly.com/uploads/1/3/4/3/134386981/joxator-gegatijokegujud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_60170c40534bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_601610c260600.pdfIn PDF document text
    • https://koditagonuxu.weebly.com/uploads/1/3/5/3/135339835/7057569.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/kawumiwobuku_denaforakupeji_zixeze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_602ce00a4b214.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/dQhehbT/home_restoration_jobs_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5ffbbe7a23349.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/Khf1Vge/mapud.pdfIn PDF document text
    • https://rabifitirigi.weebly.com/uploads/1/3/0/7/130739094/jipanudopotuwi.pdfIn PDF document text
    • https://fokubazukif.weebly.com/uploads/1/3/2/6/132683137/3619445.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/zarabitalufotizuf.pdfIn PDF document text
    • https://gejipowuxenufo.weebly.com/uploads/1/3/4/6/134681439/tebeja_sokezijademuged_zasexalif_bepopozibiguzu.pdfIn PDF document text
    • https://gusumumonabol.weebly.com/uploads/1/3/0/7/130775475/japifit-pinadora-napejojo.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/jusopufibikurir_godifos_matetuliboworev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/free_online_cv_maker_template.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/scientific_root_words_prefixes_and_suffixes.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/the_hollywood_reporter_bts_seth.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/68075553920.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/witaxotobof.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/sanyo_vcr_codes_for_universal_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/9668306739.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5288 bytes
SHA-256: 86b72931e93e206779431af91a790ddffd614b17378328e5985e402322c81dd3
font_01_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 10800 bytes
SHA-256: 30e29db5f8f3829b8fbda10baf1e487f1cea45924c797d58d20e98dc8ea828e4

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