Malicious PDF — malware analysis report

Static analysis result for SHA-256 8566dedd22158ef4…

MALICIOUS

PDF

74.5 KB Created: 2021-03-12 07:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4b5a4b8763a169b85bc3958975ac4a39 SHA-1: afd7224c6ca239f1fbcfab2fdcb79a1dd65abc3b SHA-256: 8566dedd22158ef43b2123c506736c0fef2517780e79e9a45ddd7720c4e6d32e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://pelibifir.ru/award?keyword=membuat+cv+format+pdf PDF link annotation
    • http://trickyturkey.com/ancient_magus_bride_episode_21lv0a2.pdfIn PDF document text
    • http://venira.su/58067257148s1mmc.pdfIn PDF document text
    • https://zivejopoji.weebly.com/uploads/1/3/4/2/134266783/1883f9.pdfIn PDF document text
    • http://batmbatm.ru/ligezumojediwexo6db.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/8GZtMja/online_python_compiler_3._8._3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_601b1c734d386.pdfIn PDF document text
    • http://sberbank.link/wassce_2019_chemistry_questions_and_answersku9e9.pdfIn PDF document text
    • http://osmosiotzs.fun/what_literary_theory_is_being_used_in_the_text4aiuc.pdfIn PDF document text
    • https://junurewumopu.weebly.com/uploads/1/3/2/7/132740614/gewatawiboxefobido.pdfIn PDF document text
    • http://mail-autoscout24.net/cosmopolitan_las_vegas_pool_clubqqdw0.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/y23jejf/bloons_td_battles_apk_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/ypjdWAr/zombie_apocalypse_birthday_party_game_ideas.pdfIn PDF document text
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/5163026.pdfIn PDF document text
    • https://sekonumewazu.weebly.com/uploads/1/3/4/1/134131339/377240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482631/normal_5ff7a8f5a6f30.pdfIn PDF document text
    • https://cdn.sqhk.co/tisorobew/KjiRIge/archery_king_baahubali_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385859/normal_5fc943adb8e51.pdfIn PDF document text
    • http://paksorond.xyz/meaning_of_riba_in_quran_verses98vvm.pdfIn PDF document text
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/nabepagi_robuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_5fd98ac1e5934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_604ad96aa8880.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/gji4lgg/17634605242.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_75968fb9ff2a4300a0b6597fa756c33b.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_1dfd6dc566db4e6c98c9106a879931fc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 5296 bytes
SHA-256: 215a819234598a7230e8d46e3131340e9e5cf4e9fa240d4b2c780a77dc4d0ba6
font_01_sfnt_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 10380 bytes
SHA-256: 780a6f517cc0ee772065564a6d00ab6a8c059dba92196db8e225cade8e86dd5d

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