Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a66cf03b1930e3…

MALICIOUS

PDF

69.6 KB Created: 2021-03-06 08:23:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d104f0c35006aa5e37955c01ffb21bbc SHA-1: 864505a703dc600b59663efb735f873e1aeb88d9 SHA-256: 97a66cf03b1930e3fbe739b4c91dd3b4b5392f8b70ab90c1a696553b56f341fb
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, forming a link farm hosted on disposable domains. The primary lure appears to be a soundtrack download, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://jacksth.ru/award?keyword=the+secret+dare+to+dream+soundtrack+waiting PDF link annotation
    • https://venolebibu.weebly.com/uploads/1/3/5/3/135348563/kanog.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/lidgcZK/bein_sports_live_stream_free_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/gjhhjbN/mini_snake_hidden_camera.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/6043768.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/5855188.pdfIn PDF document text
    • https://bitugibetofovo.weebly.com/uploads/1/3/0/9/130969362/e0079.pdfIn PDF document text
    • https://lilalosemojuwo.weebly.com/uploads/1/3/0/8/130814601/58323f.pdfIn PDF document text
    • http://xazutakivad.iblogger.org/how_to_release_psoas_with_ball.pdfIn PDF document text
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/be5d849dbecd7f1.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/hF7hbiC/steam_lunar_sale_2020_best_games.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/dQ2VIic/paxorapebevo.pdfIn PDF document text
    • https://cdn.sqhk.co/xevuvuxene/hjjihCq/f4_phantom_jet_model.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/y59hfic/art_of_war_book_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedatowuka.epizy.com/fomawofuxokimu.pdfIn PDF document text
    • http://bejerokifeko.rf.gd/what_is_universal_set_in_set_theory.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/nvidia_shield_4k_hdr_android_tv_box.pdfIn PDF document text
    • http://mojorudo.epizy.com/peltier_cooler_coefficient_of_performance.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62A 5308 bytes
SHA-256: 0c0d300f0be19630936279141ea7ea07f421934a672eda03be235f30d85d0b4c
font_01_sfnt_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 10164 bytes
SHA-256: 7a6ead355e073f9723514a5071aab02b710b124884707b3747982555ea7098a6
font_02_sfnt_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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