Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14dee4777b2bb97…

MALICIOUS

PDF

76.2 KB Created: 2021-04-29 13:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 042eb36fdf9fe21a313cbcf93db62492 SHA-1: d8438c21b426c89ab02779fac95f34da5529326a SHA-256: e14dee4777b2bb9779c197e806eaebf04af15432f3572dbe0fa76670189ec7ec
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+to+trade+forex+automatically PDF link annotation
    • http://lugodapamaj.mygamesonline.org/58454429378.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/stanley_fatmax_level_72.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/hjejd74/drill_evolution_game_no_download.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/pdf_annotator_program.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/bmp_to_converter.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/jGiebii/banana_pudding_poke_cake_recipe_by_tasty.pdfIn PDF document text
    • https://cdn.sqhk.co/gutejalajige/hiek0gj/divojotu.pdfIn PDF document text
    • http://xijivedijimidip.mygamesonline.org/92937286803.pdfIn PDF document text
    • https://cdn.sqhk.co/lekixubegewo/Ggiifjj/best_diesel_tuner_for_2018_6._7_cummins.pdfIn PDF document text
    • https://cdn.sqhk.co/tekixonef/gcZV51O/mizonokixivoda.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/does_chris_live_in_get_out.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/h2heqjc/komumesijalikura.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/dinike.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/aQ7Uarj/jepogubilopufizoxuteba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_b4f998193af146ff8bdb4fc8a3d5e731.pdf?index=trueIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_a8814dc723174881a42e2db11ab3fecb.pdf?index=trueIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/cbse_psychology_class_11_book.pdfIn PDF document text
    • http://zijaxana.rf.gd/duxoligawimuvejume.pdfIn PDF document text
    • http://gobupisimas.rf.gd/cambridge_igcse_chemistry_past_papers_2015.pdfIn PDF document text
    • http://vusomon.epizy.com/bojatujowawaku.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_off0000ec6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6A 5212 bytes
SHA-256: c77ca3fe30a52371c4576085ae2470c8965d8598a62846458243fc6b4258739a
font_01_sfnt_off0000fe2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 11060 bytes
SHA-256: 8d7fcb79bda4bcb52b052af78cde7ff32c73cfb7fe146d9e61743b61bdd77d2b

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