Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc510e34aa681da…

MALICIOUS

PDF

77.3 KB Created: 2021-02-24 17:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f0ff6b9bdbc3db9982a1743c88fe074 SHA-1: e31530d83e853d97e46e2d3d5caa15ae0e18bddd SHA-256: 0bc510e34aa681da315910a1922f444e30d2fef1f9c806024b5e94cc5a004d7d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, a technique often used for SEO farms or to distribute malware. ClamAV identified the file as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://druttle.ru/123?utm_term=quadra+fire+pellet+stove+auger+motor PDF link annotation
    • http://zaxevef.getenjoyment.net/time_capsule_movie_cast.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/zotojedas.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/75290449433.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/6261188.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/fonalipobev_degixelifi_wagojuda.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/872470820e69.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/terry_pratchett_wyrd_sisters_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457592/normal_5ffa693ef04fd.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/6950619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavibajegis.onlinewebshop.net/94509761729.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/50974903754.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/pebodixejoluxixozitedib.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/android_emulator_ios_10.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/harry_potter_hogwarts_acceptance_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/everly_brothers_bye_bye_love_sheet_music.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/how_do_i_calculate_pool_pump_flow_rate.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/block_spotify_ads_android_hosts.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/tibijejazemanegesobiror.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/intimidate_victim_dissuade_reporting.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/is_eso_worth_it_2020.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_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 5484 bytes
SHA-256: 279d75e4f9074ab1a936410dc336d62d4f4cfa5847d2f5e554e85224ac509eb9
font_01_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 10760 bytes
SHA-256: 1605b9328b62089219271a29514ba8cae475ce48d870cb5af2f6c5e874218046

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