Malicious PDF — malware analysis report

Static analysis result for SHA-256 80877e364b4f6995…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 17:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 292bcb774cc7a2388a3af144144dfc79 SHA-1: a4068c677e9bfa3e89ebf5fe460539d695e5863e SHA-256: 80877e364b4f6995f5d3c017c16d11b72cc115e6284bdfd7a1d2094f9965080c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://xezojetit.ru/award?keyword=leadership+development+pdf+free+download', is presented as a lure for free downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=leadership+development+pdf+free+download PDF link annotation
    • https://jowufawogutezob.weebly.com/uploads/1/3/0/9/130969037/peviriwavilefa.pdfIn PDF document text
    • https://sujuwezel.weebly.com/uploads/1/3/4/4/134486010/6210305.pdfIn PDF document text
    • https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/kakeri.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/ermANgj/sim_empire_help.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/basic_math_word_problems_quiz.pdfIn PDF document text
    • https://bokakuvuzojoji.weebly.com/uploads/1/3/4/3/134351808/3302991.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/27a76d28a255b6.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/pamawu.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/eyrgigd/passport_id_photo_maker_studio_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_f9ec6f9d73c540e9b65a1c074bc1598f.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_284ae387b4df436fb89e3d7524b86b4d.pdf?index=trueIn PDF document text
    • http://povapetaranawo.rf.gd/musoroguwafudebatozomawor.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/17633270368.pdfIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_b2bf4adcce3a4073935fd4608fde9472.pdf?index=trueIn PDF document text
    • http://livirava.atwebpages.com/62203387377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8390415d-0e04-463f-9af9-b2530bad3394/gujenorawizixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cac5ff-72ba-4998-a1d4-013a6b16150d/how_do_i_turn_off_the_alarm_on_my_armitron_watch.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_931b5b7dcc3d41bd84644b2692dd8891.pdf?index=trueIn PDF document text
    • http://kubuleg.rf.gd/lekuzibadapetinavebowo.pdfIn PDF document text
    • http://ligekasuxube.onlinewebshop.net/jirolibulupagesowenesi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 5372 bytes
SHA-256: 41d5c9305f36ff1d1ed0d444b3ee4ce4a8b3cb9220b75a13bae110bb7d7f11fe
font_01_sfnt_off000108c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C5 11216 bytes
SHA-256: 3feb566b0b1c8c36f6c7f8c0ab344ccc0e8b93bb1a549df2748d09ca463159f9