Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e4339d1c77375a…

MALICIOUS

PDF

83.5 KB Created: 2021-03-01 10:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e7ce100d34414acb17f6692b01bc9874 SHA-1: d60ceb5134d44b7e7cd197b41dcd26cc3faa8304 SHA-256: 95e4339d1c77375a72a4f15b94980b38e661451b7d51ee98e4ae9047e1583270
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically uses a 'utm_term' parameter suggesting a phishing or tracking lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious campaign, potentially leveraging embedded JavaScript for exploitation.

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 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://jottigo.ru/strik?utm_term=what+is+the+song+a+whole+new+world+about PDF link annotation
    • http://matrixbicycles.com/70365216138hwfho.pdfIn PDF document text
    • https://mijevofere.weebly.com/uploads/1/3/1/6/131606011/f7977e.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/hhjcmje/bigodobavupi.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/Tidiehd/zombie_smasher_war_defense_games.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/c124377a.pdfIn PDF document text
    • http://kmplitka.shop/switch_pros_mount_trayrwele.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/kvhgjjh/ghosts_n_goblins_mobile_1._00._020.pdfIn PDF document text
    • https://zezexofoji.weebly.com/uploads/1/3/4/3/134344156/suxupawiv-fabozelokolip-mibosube.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/81051840837e0di4.pdfIn PDF document text
    • http://sobakin.space/english_reading_comprehension_grade_2qw8ll.pdfIn PDF document text
    • http://perevod24-card2card.site/basic_health_physics_problems_and_solutions_2nd_editionupdpg.pdfIn PDF document text
    • https://lakupofudeb.weebly.com/uploads/1/3/0/7/130775354/jexoka-pifijif-belajudojeru.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/jiaqCjd/power_rangers_in_space_psycho_rangers_toys.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
    • https://s3.amazonaws.com/kegovev/flat_rental_contract_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/69795896162.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/62434228961.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/jivomobipafuvisedujep.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_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 5216 bytes
SHA-256: 42006e1a02b41c07f0d1b5540bc074a57dbee6aa96d598de6c35345ac3146bf0
font_01_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 10644 bytes
SHA-256: 4076e59a65c7ecc485da7e60b5be93d779c35bfa0351e66c91be9fa0e4a42817
font_02_sfnt_off00013247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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