Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91c52b872d9bcb4…

MALICIOUS

PDF

98.4 KB Created: 2021-03-20 19:21:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5d8c7ca42fbba727fc60581e16ac4b6 SHA-1: 705b392931b888ec4464b02646daa1c753e0ea51 SHA-256: c91c52b872d9bcb4051a61632f4f19a662ec48f34564e160a24cb9710cbb5a6c
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 0.9995

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://golowaki.ru/strik?utm_term=what+is+maslow%25E2%2580%2599s+theory+of+motivation PDF link annotation
    • http://thedouche.xyz/math_worksheets_for_grade_1_number_lineqsshn.pdfIn PDF document text
    • http://mosquito.codes/61148867169bf8aj.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/7032749.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/Qjfjcgf/93042141113.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/c086c12.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofoziga/hdieYKn/63421747342.pdfIn PDF document text
    • http://flathead.us/64076339804pp51m.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/bqhcfgh/scholarship_essay_header_format.pdfIn PDF document text
    • http://ryursew.space/aha_cpr_guidelines_2018x2uw0.pdfIn PDF document text
    • https://cdn.sqhk.co/junizafuzep/igJgdgi/zotutagiz.pdfIn PDF document text
    • https://jojapunopumaj.weebly.com/uploads/1/3/1/4/131482926/e73ccda.pdfIn PDF document text
    • https://magapevalapa.weebly.com/uploads/1/3/0/8/130874167/41ad9dfbc2.pdfIn PDF document text
    • http://subfamjtii.site/graco_lauren_convertible_crib_instructionscbq5m.pdfIn PDF document text
    • http://topcreditcheck.info/the_office_script_casino_nightvfiwc.pdfIn PDF document text
    • http://udilische.club/2247201355g41wm.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/Oig2Jii/basketball_shooting_games_online.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/47a9f182-b9fe-43b1-b687-f4b8de623c8f/23036053484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2410adcb-aa54-4769-9455-02589d1965fe/burger_king_menu_prices_canada.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_2a7b1eaa9cbe446aa188e7f7a23ddffc.pdf?index=trueIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_2faa696f9cc849369b591b05cd0881bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5ec03a-6184-4d58-a54a-63d20077a9c8/taylor_digital_weight_scale_reviews.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_b672625f69a84c698fa12a21037ec204.pdf?index=trueIn 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_off00013ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFD 5324 bytes
SHA-256: 9fd209a8c842e6f6909f81e7311e033a4e3bd84d795e50807ecd7ef62a8b87b9
font_01_sfnt_off00015217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15217 11540 bytes
SHA-256: 89e186dbba1d88b728c13bb1130fde07da4abca3be48e3de72fe63cc16615092

Open this report in the interactive analyzer, or submit your own file for analysis.