Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d8459d072f2806…

MALICIOUS

PDF

78.6 KB Created: 2021-03-29 21:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 76c91b3b758d3f2b3095fb3afed42a68 SHA-1: ad78eb84900608afdd21b9994c3f7a31dea76645 SHA-256: e1d8459d072f2806285d80c9024061709acfdf52b1c3a84820bb02ae1c3d6df5
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. It contains a large number of external links pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a callback lure heuristic also indicates potential phishing or scam activity. While no scripts were explicitly extracted, the PDF structure and external links suggest it may be used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 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.
  • 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://fokemale.ru/aws?utm_term=unlimited+power+sheev+palpatine PDF link annotation
    • http://esclub.info/stealth_cam_night_vision_monocular_manualri7ks.pdfIn PDF document text
    • http://flowerport.market/nizoxgtrcv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478131/normal_6037bee163034.pdfIn PDF document text
    • http://italysummer.space/subidaxunirujarufobiturys0m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_6046dff869ea2.pdfIn PDF document text
    • http://tradestaroffice.com/hubli_weather_report_livekm8bx.pdfIn PDF document text
    • http://tameenegypt.com/how_to_measure_your_organizational_culture_and_valueshyb34.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/dKStwGI/blocky_car_racing_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5fd357d5bad00.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/cgh6jfp/puzzle_dragons_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_605606b3885b1.pdfIn PDF document text
    • http://effektzhizni.ru/91159744749vj9lu.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/Lggiiif/grow_empire_rome_max_levels.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_6011fbdd7483a.pdfIn PDF document text
    • http://awpmode.com/windows_10_keyboard_shortcut_move_window_to_another_screenkj8ng.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/jVGiegi/7_wonders_of_the_world_ancient_and_modern.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/practical_sigil_magic_espaolxvowz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_6033689f3fdda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_601373b0150b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487632/normal_600bc49a8e8a8.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://f187853a-68e6-4ed6-a420-9593b89d6738.filesusr.com/ugd/27c34a_b0c130d1afea41df93c934f53e0526bd.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_b76c8557ad29486c908d613108fc4469.pdf?index=trueIn 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_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 5132 bytes
SHA-256: 553b746253ff1772fcec2e091e285e72801f2f2978522f0dc18ce2076ecc6946
font_01_sfnt_off0000fabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABF 10700 bytes
SHA-256: ebf90c0bde698d2ee9ae7904fed437375b118258a2f5e06b73827fc9c76cfd25
font_02_sfnt_off00011f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F16 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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