Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f307a5d924b5e89…

MALICIOUS

PDF

80.3 KB Created: 2021-04-12 13:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5511f389cc372747ab4e9673d68becfa SHA-1: 11b6d0383905fb5278fd5176d79c90aae5e5906e SHA-256: 8f307a5d924b5e89f11e0f35844da5cae41a386cccba9f8b27e987e30f4c9101
156 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 Weebly, suggesting a link farm or phishing infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URLs and the heuristic PDF_SEO_LINK_FARM indicate the document's primary function is to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://zajinet.ru/strik?utm_term=the+collector+book+trailer PDF link annotation
    • https://xuzomavarek.weebly.com/uploads/1/3/1/3/131383242/gifipebazepidub-ximudafazini.pdfIn PDF document text
    • https://xavupavise.weebly.com/uploads/1/3/4/5/134584264/78a2bec2b6.pdfIn PDF document text
    • https://galujamisone.weebly.com/uploads/1/3/1/8/131871568/2a2a38000.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/vumela-lerip.pdfIn PDF document text
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/zojukinurirajukuz.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://s3.amazonaws.com/sakaburepagase/vavokukapixizaka.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/amplictil_4_gotas_bula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea94552d-a61c-4ed4-9d73-21e49fc76f89/26097591822.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/40762206369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e43da9-420c-4ecd-8613-281e2e818f54/what_order_were_the_new_testament_books_written.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab4c3d3-232d-4309-873d-301c3e5a57ba/sheehys_manual_of_emergency_care_7th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4baae0-5662-4644-a1be-5e76efb8e412/jodazozilujoromigokik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1150a99-af10-4b37-ba56-415046bcdda7/educational_psychology_salary_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b473a213-5107-4a6f-aee3-13c07cebafc7/15518082504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3daa287f-8f69-4cc0-8c9e-da3078a93833/xedizidijodilavobuxemaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fd472f-02c0-4813-8e6e-791734d2ae14/6011990148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc6dcd4-491a-4c6a-906b-cf73672e6f1e/which_is_the_best_series_on_netflix_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ac82c8-be71-4985-8587-d1818ca301a5/vajewokadija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f8b78d-fded-4718-bfb3-28e5570cb185/2006_honda_rancher_350_4x4_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/zifutojuluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e6f342-5779-4ce6-94df-18667de83b8f/danby_dpa060b7wdb_portable_air_conditioner_6000_btu_white.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/dibavexixoxutozo.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/43799458861.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/how_to_play_cross_platform_world_war_z.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/8023481644.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 4544 bytes
SHA-256: 385661da451f81b18dc22df7c78c15e58e69326f184afbf99dd02c94371e8ed2
font_01_sfnt_off0001005e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005E 10820 bytes
SHA-256: 3051ed20f6834cd420185482f7ec18d0abe1fac29c9dc8d81005338bcba501cb
font_02_sfnt_off00012543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71