Malicious PDF — malware analysis report

Static analysis result for SHA-256 128b232bbc890244…

MALICIOUS

PDF

80.7 KB Created: 2021-03-11 00:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c2ca4da7c6991632e5021886fe9f2198 SHA-1: 92310c82f1cb1babc867f3ecfed757a7283f8bc8 SHA-256: 128b232bbc890244d83c387800d7c60ae34b183ed000957c6e7516d97bc04050
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-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://soxebez.ru/wix?keyword=the+woodlands+classical+academy+uniforms PDF link annotation
    • http://naykaryadom.fun/595598380693m70c.pdfIn PDF document text
    • http://italywow.info/linajafoxiwoporojikemitakollmy.pdfIn PDF document text
    • http://lunesygets.xyz/38452193200utaf2.pdfIn PDF document text
    • https://latafixewikokaj.weebly.com/uploads/1/3/4/6/134687196/2678515.pdfIn PDF document text
    • http://sk-anker.ru/manhattan_prep_gre_5_lb_reviewjpt4o.pdfIn PDF document text
    • https://wakolixib.weebly.com/uploads/1/3/4/7/134706528/zurebupilomiwemetexo.pdfIn PDF document text
    • https://litunuvojiv.weebly.com/uploads/1/3/0/9/130969221/zixopezepifis-tesobikeri-xudeneki-kovulalufaluwok.pdfIn PDF document text
    • http://beach-fruit.fun/t0ky2.pdfIn PDF document text
    • http://videohost.space/pezaxukekofusefewataw8wv8.pdfIn PDF document text
    • http://interbankdigital.com/how_to_draw_a_hibiscus_flower_step_by_step_videov4qp7.pdfIn PDF document text
    • http://energierecrute-emplois.com/94450190384et8rv.pdfIn PDF document text
    • http://skywonder.space/49057872118vt716.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/faxujufi.pdfIn PDF document text
    • http://delayikapy.xyz/dukuvawowuzd0sol.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/1ce8f77f67e02b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c54c49da-80c7-4812-993c-fd6dbce15efb/bergey_gram_negative_flowchart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa1bd8e-a2ad-4017-9ddf-8078c08d54fd/cuantos_centimetros_tiene_un_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/aus_email_erstellen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c616e08b-efc2-4ead-b1b3-64ba9cb62002/roomba_780_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/nesiriduravufogoxozarujef.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/2002_ford_explorer_sport_aftermarket_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/c_language_tutorial_in_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 5204 bytes
SHA-256: 94347581d742985120e526e2889d44b8089b4f19a0533550ccef41cd286d27d6
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 13192 bytes
SHA-256: db78b3ed64f07a3e57a52377cbeb74d2e6cfc58813b8111c4940ca3a48618a1d
font_02_sfnt_off0001276c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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