Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c9b3627caa1807…

MALICIOUS

PDF

93.5 KB Created: 2021-04-06 19:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4669bda8a551d65921ad1452671fdebc SHA-1: 9011dbd19676b50a59641000758d404ea98529ff SHA-256: 87c9b3627caa180744a37749025818c5b10ab85acae3cec9f2f37a2bd0108bff
156 Risk Score

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 0.9989

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://bologen.ru/wix?keyword=landlord+letter+to+tenant+about+cleanliness PDF link annotation
    • https://cdn.sqhk.co/fodexuxefeba/ifjgheM/gba._emu_apk_1._5._45.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/AeVjchc/80190692871.pdfIn PDF document text
    • https://cdn.sqhk.co/mikujudo/gccfafU/interpersonal_communication_skills_defined.pdfIn PDF document text
    • http://civiliscmq.online/speak_to_the_manager_game1o476.pdfIn PDF document text
    • http://trylait.pro/us_army_enlisted_ranks_wikiziabl.pdfIn PDF document text
    • http://vertitribe.store/what_is_electronic_media_and_exampleshwirv.pdfIn PDF document text
    • https://duwodalufe.weebly.com/uploads/1/3/3/9/133997525/818b1.pdfIn PDF document text
    • http://sayfelengs.space/the_divine_comedy_of_dante_alighieri_inferno_summaryry94u.pdfIn PDF document text
    • https://karewugudamebag.weebly.com/uploads/1/3/3/9/133986918/xojanawa_tolak_gotitiwiz.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/8f661.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/BUPhegf/depinix.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/foxamegiwepu_nufogusorazores_niwidi_xoluve.pdfIn PDF document text
    • https://vunamesu.weebly.com/uploads/1/3/5/3/135324142/2746166.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/punurum/43241806257.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/7535753557.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/board_exam_date_sheet_class_10th.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/stress_coping_mechanism_questionnaire.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/different_branches_of_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/free_receipt_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/worksheet_english_class_4.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/bemegevebinafolazowimak.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/runalemivozakodetavalak.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/ff14_fashion_report_location.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12448 4896 bytes
SHA-256: ea7b466cbffef431a2b1215417cfbc3801e8580a4b7fbc7f560ba93f3fd544b7
font_01_sfnt_off000134f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F2 10836 bytes
SHA-256: 36d92599bda0e4a578c85a919d6c2108f1836ab2a80a41a5d26f89f743c7ad03
font_02_sfnt_off000159f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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