Malicious PDF — malware analysis report

Static analysis result for SHA-256 679013897aa73ef3…

MALICIOUS

PDF

79.3 KB Created: 2021-04-23 22:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 153e9328417964cc32a346bbb463c4a2 SHA-1: 96c6d4807f90ae70609bc85c8c7e3dcfc338338c SHA-256: 679013897aa73ef39f62a83660e6faf4677936945a34c91132ba7fd49e8ba525
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 0.9997

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://seumenha.ru/strik?utm_term=i+can%2527t+feel+empathy+or+sympathy PDF link annotation
    • http://apkweb.net/kesusowerituu8xlr.pdfIn PDF document text
    • https://risuwawew.weebly.com/uploads/1/3/4/4/134403416/99e46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5ff6607f7fcb9.pdfIn PDF document text
    • http://lefuduzitenazig.22web.org/pit_and_the_pendulum_movie_1991.pdfIn PDF document text
    • http://wownatural.fun/rojedanki26n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_602b4ecc21405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491437/normal_604ddf931d324.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/75247551259.pdfIn PDF document text
    • http://5coupon.info/dixivenepiwejolycd5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_602d697b438d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_60338a53d985b.pdfIn PDF document text
    • http://stat-index-co.com/59729313320el0n2.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/volume_of_a_cuboid_questions.pdfIn PDF document text
    • https://vijisazegogufob.weebly.com/uploads/1/3/1/3/131380966/6781038.pdfIn PDF document text
    • http://findfreegirl.com/free_download_conflict_desert_storm_2_pc_gameznxus.pdfIn PDF document text
    • https://susesape.weebly.com/uploads/1/3/4/7/134734791/jakumejalonalineg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5fcf829bb7445.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/c09992d827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewuwuja.onlinewebshop.net/aortic_arch_anomalies.pdfIn PDF document text
    • http://tesitanine.rf.gd/free_printable_christmas_party_flyer_templates_uk.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/sunset_beach_quotes_instagram.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_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 5328 bytes
SHA-256: a4096c5b56076eb894b33a344ec2361886ffc7c6b4927f0031058bf3e47169fc
font_01_sfnt_off00010881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10881 11080 bytes
SHA-256: 29834fb68be681718069304e1e9ef4395ab2904fb99242dd23fec6d1fc3a3028

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