Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa7bd016c8e0ed2…

MALICIOUS

PDF

84.7 KB Created: 2021-03-25 22:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7b33b73aba048f8b92928801b4cfbf43 SHA-1: 79f19ca519a82e6bb6ea3ea9755fc61057fd06bb SHA-256: 2fa7bd016c8e0ed2b2df9850b54cc82f7702c6d31f54b51f1b65fea32331efe6
204 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically `https://dafemum.ru/wix?keyword=roux+method+lse+pdf`. Heuristics indicate it's a link farm on disposable hosting, designed to lead users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/wix?keyword=roux+method+lse+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_5fe9af836a895.pdfIn PDF document text
    • http://life50it.pro/how_to_view_bunker_hill_security_cameras_on_iphonew7f5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_60540a75b4de3.pdfIn PDF document text
    • http://tk-time.site/99430991642inf34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_6043f7687f6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_60594cfd83ea4.pdfIn PDF document text
    • http://wwbook.org/34922600469q4yyh.pdfIn PDF document text
    • http://itclick.pro/tesla_model_3_standard_range_options87m3w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479460/normal_600222e22b9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_603b74976a35f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5fe8912fc3aa0.pdfIn PDF document text
    • http://kmikaerfs.ru/how_do_you_change_the_battery_in_a_weber_igniter_grillgsjml.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/c3d6965d-29ab-4b6a-9469-34d5d259edff/how_much_is_gender_reassignment_surgery_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d3985a-dddf-4039-933d-c6e3b82792ac/xejesefevi.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/lasuramezapurabub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d26a74f-7d75-4a35-b35b-a8ff97f60960/27951748390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79aa7a95-fa42-417a-aa1b-ef99016dbefe/gejowitegil.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/braun_irt6020_thermoscan_5_ear_thermometer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/ziramokewokunewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e85288c-810b-41e6-85a3-8826c070dade/pearson_edexcel_igcse_chemistry_textbook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/how_to_install_dishwasher_drain_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f5b10d-88e5-4092-b9d4-484ff24b087f/black_skin_white_masks_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7020e960-2aa8-4be5-a1a8-55f87222f676/puleduxojusuvot.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_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 5224 bytes
SHA-256: dc6530993e450b9c14b4f9f671077e39d50dbadbe08d15a705bc5943cdeeb7e2
font_01_sfnt_off000107d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D6 5052 bytes
SHA-256: b19ca2f0e87d71d8ee2d5edf9adebb1f19e7eef2ac05e8ef2b6055c546b5bf5f
font_02_sfnt_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 13976 bytes
SHA-256: 935e2adb4e01ec860689905d493615f8f75dd2439a19c7044eb48ee78ac6368b