Malicious PDF — malware analysis report

Static analysis result for SHA-256 9285d875906f3b1b…

MALICIOUS

PDF

75.9 KB Created: 2021-03-09 15:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6a69c79efbf2cb57f2c79aa1768cce85 SHA-1: b4af6ea552e1999ca5558b9d29864346789781ce SHA-256: 9285d875906f3b1b9b90f4861bd5653a03f34de97303ea45103df70e6a2fbc08
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used to host further malicious content or phishing pages. The presence of a link farm heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=american+laser+centers+colorado PDF link annotation
    • http://fasadi.site/fejufotezazodefifufegevgxh2.pdfIn PDF document text
    • http://goodnaturak.space/rafawitlvqw.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/iiehhgh/2467737636.pdfIn PDF document text
    • http://card2card-perevod24.site/bhojpuri_gana_dj_hd_video6u2fy.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/bexisolevuvinop.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/ghLAChf/qatar_stars_league_log.pdfIn PDF document text
    • http://mon-compte-cmb.best/waring_pro_deep_fryer_how_to_usey82p3.pdfIn PDF document text
    • http://help-nanny.site/lr_eswari_amman_songs_free_tamiltunesoehv6.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/ijfzXjf/idle_empires_guide.pdfIn PDF document text
    • https://mavuzoxawajike.weebly.com/uploads/1/3/0/9/130969593/vedibitodeto.pdfIn PDF document text
    • http://cardio-active.site/15634967833njth0.pdfIn PDF document text
    • https://dosupara.weebly.com/uploads/1/3/1/3/131380612/7675425.pdfIn PDF document text
    • http://1fps.ru/rorivenemikikoql4lj.pdfIn PDF document text
    • http://igcopyrightclient.com/nezuloxurelp5hht.pdfIn PDF document text
    • http://yewes.fun/vezulexivobubfe92d.pdfIn PDF document text
    • http://naturfresh.fun/blackpink_ice_cream_songvoce2.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/jaloto/coreldraw_x7_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/riferokidovoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/55380998567.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/numbers_in_words_1_to_100_download.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_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5072 bytes
SHA-256: 06ac2a53ce7af187b65af070b5bf841ffe5d37aa71789a057b5cd53d8d6aee06
font_01_sfnt_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 10460 bytes
SHA-256: a97dc48af1b579e2defdad1fb02cdf294ef72bd44d9cb0c67c23d4698df70834

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