Malicious PDF — malware analysis report

Static analysis result for SHA-256 97851f8e060c7dc1…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 01:12:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5130ad9a25894d4aa8680697324074ab SHA-1: 50d810e89fc1b0ebdc224f020ece3ed77df87b23 SHA-256: 97851f8e060c7dc1a5f5d84ad166068534b5d345d2a5ed6f0a091788841c8cd6
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 0.9996

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://xezojetit.ru/123?utm_term=board+member+application+form PDF link annotation
    • http://canonsburglake.org/kufoju88pec.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/kisuvotemo-rovoxevixavixej-lujepejaku.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/hiegfid/17386627203.pdfIn PDF document text
    • http://oneitshop.info/141672264179ujdp.pdfIn PDF document text
    • http://walkover.me/fireboy_and_watergirl_5_elements_walkthrough_100biw4z.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/ib6jjhj/nawelaveg.pdfIn PDF document text
    • http://befigter.xyz/44972362754x709h.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/52241308068.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/gigaicp/music_theory_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/vafexifere/ftnmVd7/vector_marketing_corporation_bbb.pdfIn PDF document text
    • http://testrun.ru/bixidobirevegadiribarokocjpqs.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/19b71e82.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/eheielT/first_aid_kit_items.pdfIn PDF document text
    • https://memefuzagimo.weebly.com/uploads/1/3/4/6/134612336/jamapuve.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/3604070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_aac4bad8d76145b5ab0f6560ac60cea3.pdf?index=trueIn PDF document text
    • http://mifinuxob.epizy.com/eu_behindertenrechtskonvention.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562b0b2c-81d7-4e0c-9693-5b0d3f161043/what_two_colors_make_sage_green.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_77bafec111b1418e9ccd6e5acb543e61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/289d10cc-3cd6-40ab-88d6-d1803e0e577d/79346279789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fce8bc1-8451-4e5c-a52e-ff21fd8b4f7b/what_weight_can_baby_bjorn_carry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242b27ef-1784-4f1e-a08c-bd234620af93/94535247291.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_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 5312 bytes
SHA-256: ba19713b7edbc363ad980e831295f7af5cc8bc7f5d847ec51a0163bbc0fa60de
font_01_sfnt_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 11288 bytes
SHA-256: 9b8a304879a46f7e40ffc3d6c59161ccdb8ac8dad8f86f600c0f22aaf542c41c

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