Malicious PDF — malware analysis report

Static analysis result for SHA-256 10820f239f677b67…

MALICIOUS

PDF

79.9 KB Created: 2021-03-14 16:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d2188b551c0f6921c5246d8425b95a71 SHA-1: 5881e58c5dc2b2520c1c655b403ca996a4c7380a SHA-256: 10820f239f677b67bb06b685f25b77a9298ffdac10dba43b556458e6f668dd60
126 Risk Score

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 0.9993

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://nipisod.ru/strik?utm_term=linksys+ea6500+v2+manual PDF link annotation
    • http://ruvogodozipabiv.scienceontheweb.net/mawalikikumuzogofik.pdfIn PDF document text
    • https://vagobodowi.weebly.com/uploads/1/3/4/6/134600101/7ffedbaa556ae2.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/jjPgfvY/towotawo.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/hvBiigE/safeway_horizon_drive_grand_junction_colorado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_6026ccf561fa8.pdfIn PDF document text
    • https://budawimimizav.weebly.com/uploads/1/3/0/8/130873912/darujafem-keped-nipatugokesunog.pdfIn PDF document text
    • https://lalibirubifo.weebly.com/uploads/1/3/0/8/130873838/0da180f3.pdfIn PDF document text
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/4181602.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/97d8948e547e6.pdfIn PDF document text
    • https://vijapuloxo.weebly.com/uploads/1/3/0/7/130775263/tutazekoraladu.pdfIn PDF document text
    • https://cdn.sqhk.co/rafukilus/jihirja/lectio_divina_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/hibiahc/bounce_back_email_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/jazepoxamib/jjiH4ho/bx39_bus_schedule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453337/normal_5fc9f4cf7d923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5fdb1a7146522.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/wd_250gb_my_passport_wireless_ssd_review.pdfIn PDF document text
    • https://ruzepekipup.weebly.com/uploads/1/3/1/3/131398244/devazop-kazatu-nedatumivena-ziwuzeba.pdfIn PDF document text
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/wawasufizuwone.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/dasenoxurox.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/risisipajole/puxawuremuwupuz.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/billboard_awards_2019_performances_bts.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/37432746718.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/57496342257.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/formato_minuta_de_trabajo_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/chillara_kottu_chittemma_songs_movie.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_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 5452 bytes
SHA-256: a2c5ae133e72743010e7c89af1e0a7133ce9a8ee8b32b6702d740211a1209f5e
font_01_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 11084 bytes
SHA-256: 71b1cd431c220cfd46f8d89471044a0b7c5337e145cae7c29d1682ccc18ee2eb