Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b924f52752aa43…

MALICIOUS

PDF

91.3 KB Created: 2021-04-03 19:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4c18ee5e8b3499d31b2ee6c2cb595886 SHA-1: cacd681009ce207c6289b0894451d26b4e3965da SHA-256: f3b924f52752aa43b5afc4d49bb7b7784f978954ade3e11cc18bcab04735ef59
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=gwen+stacy+and+harry+osborn PDF link annotation
    • http://sedugarawale.22web.org/zukegejagijima.pdfIn PDF document text
    • http://best-ital.fun/dawuduserisejugutn03e5.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://qrastenmap.online/s3_bucket_website_url_formato52pi.pdfIn PDF document text
    • http://c-advance.space/gebavupoginupugem40o7x.pdfIn PDF document text
    • http://presentinsta.online/nderungsrate_mathe_formelkrkkt.pdfIn PDF document text
    • http://grigolia-studio.ru/76394853310gn7wd.pdfIn PDF document text
    • http://natur-bio.space/tewesebavovaxivuxemorett3is4.pdfIn PDF document text
    • http://money-team.site/javexefosububogezotilomif4h5js.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://loxexezusus.rf.gd/spider_man_ps4_suit_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/84559234054.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/21768173074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48419a66-517a-4750-b848-df16fd62dbe6/what_is_the_receptor_for_taste.pdfIn PDF document text
    • http://kejajifuwud.rf.gd/99764298331.pdfIn PDF document text
    • http://bebewijelukisa.epizy.com/genie_pro_screw_drive_cm8600ic_a_manual.pdfIn PDF document text
    • http://rowovenali.epizy.com/kivininomubateximobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d5033c-273f-484e-8827-d4b24bff28cf/words_of_power_quest_skyrim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333c2bcc-737f-45e7-b359-06d97b9fa8d3/56886602802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f260bae-68bc-4b4f-b7b0-2511fe3e509a/percentile_rank_calculator_with_mean_and_standard_deviation.pdfIn PDF document text
    • http://tejoratu.epizy.com/pirivezutavevevoto.pdfIn PDF document text
    • http://guwajogijifode.rf.gd/injustice_2_mobile_campaign_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12563 5360 bytes
SHA-256: 27f3fa95b741363ee1d073f28b6acb3fe0b3f8a5d420e47fe1413fd730196aa1
font_01_sfnt_off000137ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AE 12724 bytes
SHA-256: 71d7cfecbb85027bcdb525e96cac641a8f7b86f82ef576d90257eeac25865da8

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