Malicious PDF — malware analysis report

Static analysis result for SHA-256 85499fd58e1d46b4…

MALICIOUS

PDF

83.2 KB Created: 2021-03-20 02:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e12f17e5ed321f30c8572f90826e2cde SHA-1: 2196d8676a67349d26814cdc2b95f11040088a79 SHA-256: 85499fd58e1d46b4b2f0e42748a272ed01c383d31ffad9fce6186ec4d3e206ad
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech support scams. While no scripts were extracted, the presence of external URIs suggests the document may lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://midufefew.ru/strik?utm_term=how+to+remove+an+adt+system PDF link annotation
    • https://cdn.sqhk.co/kurafuso/jjhahYA/invaders_from_mars_1953_film.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/UplV0Ky/96854314535.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/gfEgcjd/easy_language_translator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/PN2xThi/dragon_kirishima_x_dragon_reader_heat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450641/normal_603e84ce4e7c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5ff3b1a9177e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467019/normal_6004a1e1e679a.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/gehfMhc/lopuw.pdfIn PDF document text
    • https://cdn.sqhk.co/xudadidi/D2ha2jG/vanadimesabenonoju.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/jbjhEgi/9406606936.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/gCvjZjf/decoracion_de_halloween_para_salon_de_belleza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_60028c3f9a0e5.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomekurufe/ihfjhge/tanky_elementalist_build_gw2.pdfIn PDF document text
    • https://cdn.sqhk.co/dunokufimove/ie6ljcn/lindex_baby_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sozonexof/jsgdgd1/95938305383.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/Zih41ic/jotilujemibagolemox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf549215-8436-4f84-a472-7e48ca881b99/perfect_english_grammar_past_simple_mixed_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014c5553-4e61-4d19-9a1e-4b51a468fad2/stihl_bg86_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82878638-0c55-4570-8081-a94d1eab68bb/how_to_crochet_a_small_dog_sweater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c630d597-0bfe-4d87-91b4-479d383e2171/ncees_fe_reference_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86e5766-28bb-490b-9dbf-3a204b0936be/sonic_fruit_fizz_nutritional_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6b8dc3-b753-489a-a3d9-34c8e564c60d/american_history_x_movie_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef5db96-d482-4cbb-905b-0a5447f0df90/55896919669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec18dd00-1ad1-4331-894d-7322b3cbbe62/stihl_fs55_price_in_india.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_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 5156 bytes
SHA-256: 2461d184f180b6d6561e5f76aa95749206a11d44e7fd37b88ea3a362a9ac088f
font_01_sfnt_off000118af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AF 11352 bytes
SHA-256: a26a8de833036bb559fd17eda37492139c08552d87cfaf4e4649bcf4edb14539

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