Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9ce804df09ebfe…

MALICIOUS

PDF

77.3 KB Created: 2021-03-25 01:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 29f7fca0ff98d059ae80b59eb23af316 SHA-1: d2e5cbe2c2312e96e3d7d687718c6925c2f545f2 SHA-256: ca9ce804df09ebfeb6996a321d64facf0a31030e79f83ad70483b5e9a2c8e8af
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 0.9998

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://midufefew.ru/123?utm_term=anaesthetist+performance+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374698/normal_6035b77998c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_603400b1a61e1.pdfIn PDF document text
    • https://xifexovajebim.weebly.com/uploads/1/3/0/7/130740184/nutugogi-xuzubi-vebig.pdfIn PDF document text
    • http://tronreserve.online/dasepogazemhn8w.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/ocarina_of_time_great_fairy_fountain_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5fcd7a8a0f30e.pdfIn PDF document text
    • http://okclub.org/passengers_movie_original_scriptgbf3n.pdfIn PDF document text
    • http://cabinetshub.xyz/bojangles_biscuit_nutrition_info6uawc.pdfIn PDF document text
    • http://freud.icu/live_bait_fishing_rigs_for_catfish2br5v.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/4380437.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/8868715901662d3x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382976/normal_5ff9cb618e89e.pdfIn PDF document text
    • https://foxisejolod.weebly.com/uploads/1/3/4/6/134626470/merewakovevovejiniri.pdfIn PDF document text
    • https://kuvomudoriri.weebly.com/uploads/1/3/1/4/131406544/vamifaf_wukarixuba.pdfIn PDF document text
    • http://salonlabs.xyz/stairway_to_heaven_lyrics_heartnafzg.pdfIn PDF document text
    • http://legiontry.online/pajipositoxajamigesir4gi90.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/6e5fb05f-c5ea-4eae-a1bc-fb6d59ebf45c/my_pet_dog_essay_for_class_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333ea08f-eb35-4c69-912f-5e3b9599155b/how_to_read_volume_from_a_graduated_cylinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326aa499-f3c0-4bde-9630-98e588bc5e74/14392048216.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/nfhs_basketball_rules_download.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_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 5352 bytes
SHA-256: e464e971fc11dcf3da2abaa77d1233eedb54624741bf157176d938ef423bc02e
font_01_sfnt_off000102b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 10748 bytes
SHA-256: 63969e72b19ebe0b69d47fe9e5b23ebd28806facc1505896caf3e11b58436e73

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