Malicious PDF — malware analysis report

Static analysis result for SHA-256 1510190d5014e769…

MALICIOUS

PDF

70.5 KB Created: 2021-02-09 17:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b35f751420ef105c8ca239390bb235c9 SHA-1: ecc7f17bf2c59e5e071bbc19ae054e96130c1a59 SHA-256: 1510190d5014e769e534d908ee50ccbf848620f3158e199d6a0dabb3f8476a9b
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting services or suspicious domains. The document body, though heavily obfuscated, suggests a lure related to WhatsApp archive viewing, which is a common tactic for phishing or malware delivery. The high ML score and ClamAV detection strongly indicate malicious intent, likely involving the redirection of users to malicious sites.

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://bologen.ru/aws?utm_term=cara+melihat+archive+chat+whatsapp+di+android PDF link annotation
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/pepobuma.pdfIn PDF document text
    • http://cmbespaceclient.xyz/types_of_malicious_code0tmr4.pdfIn PDF document text
    • http://italdom.fun/christmas_dot_to_dot_worksheets_1-20ri9ek.pdfIn PDF document text
    • https://josugutidilem.weebly.com/uploads/1/3/5/3/135387313/8811144.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/sixelerib_sadigefukovix_puvodudovexosi.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/hfZrHhi/92235681052.pdfIn PDF document text
    • https://cdn.sqhk.co/porodiwaten/iriiggk/59907963253.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/9043098.pdfIn PDF document text
    • https://nojezedefefowas.weebly.com/uploads/1/3/4/7/134762002/kowituso.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/39b06e21.pdfIn PDF document text
    • http://mosquito.codes/90296612282tpqs0.pdfIn PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/1487030.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/n4gchiC/89600125931.pdfIn PDF document text
    • https://cdn.sqhk.co/jikogifuxa/c6hekz9/gold_party_casino_free_slot_machine_games.pdfIn PDF document text
    • https://nulaxevaximuji.weebly.com/uploads/1/3/0/7/130776814/kopadimizinaxotux.pdfIn PDF document text
    • https://tetomorefaboma.weebly.com/uploads/1/3/1/3/131384600/giligojitumozo_desexi_povazenobaraj_limuvimu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 5372 bytes
SHA-256: f7d6b71d301106d4862416f80879b6200dc17f4abc028f4b90242acd4917b0d4
font_01_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 10252 bytes
SHA-256: a35046ee9ab81b06722986eeca4ee03ccc8dae2df48f1798dc821442c5aebce1

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