Malicious PDF — malware analysis report

Static analysis result for SHA-256 170bcd406e9a05eb…

MALICIOUS

PDF

78.2 KB Created: 2021-02-26 21:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f4302da95593d61b75e89260658db861 SHA-1: d7f1967e4b22543591ff46e7adc7c31ba4b45344 SHA-256: 170bcd406e9a05ebcac91cf3232511574c7f7ffe32f706a9247667ca6fed6083
146 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The heuristic 'SE_CALLBACK_LURE' suggests a potential callback phishing or tech-support scam pretext, aiming to trick users into contacting malicious actors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://golowaki.ru/strik?utm_term=infinix+note+7+lite+price+in+pakistan+2021 PDF link annotation
    • https://cdn.sqhk.co/vejurumilef/djcqijh/lavetimafitimizokiwex.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/cGZhgih/xopuf.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/16240970580.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/71254502533.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/Oidxijg/83028989542.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/5rjehcJ/62529398789.pdfIn PDF document text
    • http://titoto.xyz/kindle_app_for_android_free_apkr32sh.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/ajdV9C8/rdr2_legendary_animal_locations_map.pdfIn PDF document text
    • http://letnesil.xyz/desawar_satta_king_delhi_reportacxih.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/TgdjjUw/28731080593.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/ge7fiWI/drive_apple_download.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/wihfW4J/rifurumesiwa.pdfIn PDF document text
    • http://lolkek.xyz/41395275901l0zkj.pdfIn PDF document text
    • http://tikovg.xyz/embed_power_bi_report_in_sharepointm17uo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newemepakirid.myartsonline.com/oxford_common_mistakes_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/juwet.pdfIn PDF document text
    • http://lafeseg.rf.gd/magnetic_current_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/15518721099.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_off0000e8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AC 5484 bytes
SHA-256: d8eab9f53aa67b6b784f133d209840e0f0db4d657085bf8af4c6523e45a567b3
font_01_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 2092 bytes
SHA-256: 13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
font_02_sfnt_off00010516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 11000 bytes
SHA-256: e36ff62a7fe2551be8da463c6a392bc2bd9b259bf7ded23e42cb73a13a833d88

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