Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c25889ee2c6c5f0…

MALICIOUS

PDF

71.6 KB Created: 2021-04-23 07:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b98de5615d9dfbd309bb6843ec0ea79e SHA-1: ea4d19b9ea739a2571d575f276620628cd4df649 SHA-256: 3c25889ee2c6c5f00b912d3cb1a9f7ff5ea4697f9a63d1d17db563ce1abc8d9b
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 0.9997

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 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://druttle.ru/strik?utm_term=nec+dt400+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/rizitewav/gZidihb/zulokeg.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/hhimf1Z/waves_tune_real_time_live_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/eijif1I/63425981403.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/hhChjOc/25267057246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_6026775d59134.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/ifzA3aM/bizibuwebozamejegiwonexe.pdfIn PDF document text
    • https://cdn.sqhk.co/beluvano/ijcgjtC/fake_call_prank_shopee_wowowin_call_your_girlfriend.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_5fe70c98f3eae.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/kZYShjy/ear_specialist_doctor_in_ranchi.pdfIn PDF document text
    • https://sufusazowuk.weebly.com/uploads/1/3/4/3/134311692/8009162.pdfIn PDF document text
    • https://resagivet.weebly.com/uploads/1/3/1/3/131383325/bivubaligirumamos.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/6HFhgie/7198636100.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/bkhcQuz/nails_for_you_prices_erin_mills.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_604978ea42b4b.pdfIn PDF document text
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/siturewelob.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://uploads.strikinglycdn.com/files/c7032596-f7e3-484c-9517-b4764eca6097/gefeguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412a962b-82f9-4a51-9070-e74416f484ab/numal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841eb22c-f98a-4ae0-9be7-885d120a5cf1/thermodynamics_book_for_bsc_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c8b4fa-3010-4ed9-8f11-55b976716f00/12182972088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1795151-f968-4ecf-8d5b-431fead31521/how_to_see_dow_futures_live.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_off0000cfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAA 4952 bytes
SHA-256: 6d7c0d299d3954ec8cee06e3880f5c8db588caf8be11f88a38c98a9e2fd14293
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 10252 bytes
SHA-256: 84eec613dfe64faf76b5646f76a2362e2f3b03c11ddf6d0a0639a94980396bfb
font_02_sfnt_off00010370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10370 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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