Malicious PDF — malware analysis report

Static analysis result for SHA-256 79df8aba2f020762…

MALICIOUS

PDF

83.2 KB Created: 2021-03-05 20:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7e7cf5bc49e9c92b656bc93895d69309 SHA-1: 9c25a32e75b6031074c8a8e753fc973826d02802 SHA-256: 79df8aba2f020762e6e282b497028233ff6efca4f8816a75ca96584fbb3be4f8
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 0.9992

Heuristics 5

  • 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 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://mezovuduw.ru/wix?keyword=barefoot+gen+volume+2+pdf PDF link annotation
    • http://umdtheatre.ru/remijuwevibotilowezuagpq.pdfIn PDF document text
    • http://opros.xyz/the_sun_is_shining_lyrics_jj_grey7blae.pdfIn PDF document text
    • http://skywonder.space/84478911521pc1kv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_603b9e8c7c9cb.pdfIn PDF document text
    • http://amorexpo.com/jopaximukufetsp54.pdfIn PDF document text
    • http://accueilcmb.com/velodiwejododogef530a.pdfIn PDF document text
    • http://rezonansmusic.com/84350053166rubie.pdfIn PDF document text
    • http://loveantravel.xyz/dffoo_tier_list_globalzcts0.pdfIn PDF document text
    • http://metagopu.22web.org/independence_day_resurgence_parents_guide.pdfIn PDF document text
    • http://hellesypakk.online/what_is_the_purpose_of_a_personal_narrative_essay_examplesi8y5g.pdfIn PDF document text
    • http://samoe-samaya.ru/mewozapirunotijelavapuxmt9nh.pdfIn PDF document text
    • http://noverst.xyz/batman_arkham_origins_cheats_ps3ezevt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_600252270006b.pdfIn PDF document text
    • http://tiwigibafofovit.iblogger.org/bahubali_3_full_movie_2019_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fibalikirikoti.epizy.com/gemejago.pdfIn PDF document text
    • http://lanuvurunipa.epizy.com/resume_format_for_subject_matter_expert.pdfIn PDF document text
    • http://lalasajunes.rf.gd/6526860280.pdfIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_a0676848134f4c47a792d4778626edf0.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_9a173d39709a41fead371152bf992267.pdf?index=trueIn PDF document text
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_c1e2e42525dd4d72be4b660c9eecd17b.pdf?index=trueIn PDF document text
    • http://zewixezix.epizy.com/mtodo_billings_tabela.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_9c6769358d1a430aa21665788376acd0.pdf?index=trueIn PDF document text
    • http://fujatelet.epizy.com/3728536734.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_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 5424 bytes
SHA-256: bf9e02fe404b1cca9394c511b880e5af7be4b6556d26982d60e8146f5637f773
font_01_sfnt_off0000ffee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEE 10700 bytes
SHA-256: b45ff1e3c059ef5db724aa30d516cd5ce83d954acc723b898834157ee348ae1f
font_02_sfnt_off0001245f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245F 17600 bytes
SHA-256: d3074bfa832505102d27ac3d1923fc8421878bafe875f7312faf1f0bb1dac52e

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