Malicious PDF — malware analysis report

Static analysis result for SHA-256 823df91179b7d896…

MALICIOUS

PDF

70.1 KB Created: 2021-02-28 02:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0442b631c65d7b820e1b26e6c5c52203 SHA-1: 1853b35d902b723c59519f89784c1784cb3b7536 SHA-256: 823df91179b7d896f0e87a58c323e303c43aea83092bc1022d2065d00919e56d
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://crophysi.ru/123?utm_term=translation+geometry+worksheet+doc PDF link annotation
    • https://zumofimuletoxol.weebly.com/uploads/1/3/4/0/134018509/nodigefomugixo_wugofujexonak.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/16240970580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482860/normal_5fc8997e699d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_60335ed51dd35.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/hgIMoji/loud_ringtone_for_samsung_j7_prime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454982/normal_5fdea4fef28d4.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/tal_dorei_campaign_guide.pdfIn PDF document text
    • http://parhelifrl.space/sony_mdr-_100abnu7u1n.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/gtcwjhG/wifi_software_for_windows_10_pro.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/yamaha_mixing_console_mg102c_manual_en_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_5fdb56c16ef8e.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/bersa_thunder_380_pocket_holster.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/ifibOw6/42050586755.pdfIn PDF document text
    • http://arnautmebel.ru/70s_music_artists_r_bagnde.pdfIn PDF document text
    • http://podarokinsta365.site/how_to_estimate_building_demolition_costs79f07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_600bfcd644a17.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/JmhgmIQ/wexopivir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mipizaju/budismo_dionisiaco_claudio_naranjo.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/filme_apostando_a_vida.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/26086165188.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/before_sunset_full_movie_dual_audio.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_off0000d48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48A 5560 bytes
SHA-256: 2f952d043202a9943f850503d6ded319d61161b0dd94cf69f621459e3aae0c61
font_01_sfnt_off0000e75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 10564 bytes
SHA-256: c3b07cecea88f45f53f9ef4b815f57b8fb09f49030c92490c1e1318a45e9009c

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