Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc195eef1f323fb3…

MALICIOUS

PDF

66.8 KB Created: 2021-03-29 23:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0077f0e88cc381d602dc5df6935111e6 SHA-1: abc7e9acc0a4116ebe5de73a612173869ba392c0 SHA-256: bc195eef1f323fb3102dfc445c29cea337de4340f28d4f958299b47a77a965d3
216 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. It uses brand-impersonation credential phishing. 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 0.9998

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dofipoxadule.weebly.com/uploads/1/3/4/3/134314370/7806268.pdf.
  • 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://dugedepap.ru/wix?keyword=macroeconomics+types+of+unemployment+worksheet PDF link annotation
    • https://cdn.sqhk.co/letijefa/jhjbnjb/wixonorateduzoguji.pdfIn PDF document text
    • https://cdn.sqhk.co/nubevitawil/hhd8de0/gold_color_palette_adobe.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/93Uigif/chinese_birth_calendar_2019_calculator.pdfIn PDF document text
    • https://dofipoxadule.weebly.com/uploads/1/3/4/3/134314370/7806268.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/jgiisMv/baldi_s_basics_game_mod.pdfIn PDF document text
    • https://faromemexe.weebly.com/uploads/1/3/5/3/135399009/d54f579a594.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/jjfihjA/into_the_badlands_blade_battle.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/pECgeZi/chennai_super_kings_jersey_amazon.pdfIn PDF document text
    • https://lesesagipamagaz.weebly.com/uploads/1/3/0/7/130739561/8369484.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/4mc56jb/curriculum_guide_2016_filipino.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/pajumipaj-rigakapaf.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/jbgeSgv/13734825933.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/Qhiih3H/mathematical_magic_tricks_with_cards.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c421db4c-0b39-4cc5-9db5-85ec4edbb07e/parts_for_grandfather_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf5a082e-861c-41ad-875a-f4b319271ee8/what_rock_is_only_formed_by_regional_metamorphism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dce6c18-c50b-42b3-8e3a-fc8d5694f286/what_specs_do_you_need_to_play_wow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6362c1-9ea8-4a85-9d2b-114e692a6eeb/what_is_the_ending_of_the_lady_or_the_tiger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a825959-881a-421a-8beb-5a69dbabbc41/toyota_camry_hybrid_2020_se.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_off0000c7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AC 5520 bytes
SHA-256: 07de49cd27c77611016cddbd25454ef0562f4c5e9d5338be857d9cbb50d68db0
font_01_sfnt_off0000da6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 10308 bytes
SHA-256: c1ac77f006d07555a62f6efc7cd807ffd50d3f5e61d7fa200822f3f172adcacd

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