Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22d2b137e14c473…

MALICIOUS

PDF

63.0 KB Created: 2020-11-26 09:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bfc0623b32978e16ee8ed1dfd27e8681 SHA-1: b575ad9f432aae9fcf4d887375eb465180a21917 SHA-256: a22d2b137e14c473a3ae4c239f72033db81da4f813126c0d4d810e006e635815
242 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF SEO link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text suggesting it is a PDF related to education, likely a lure. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is designed to redirect users to malicious sites, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?utm_term=assessment+in+special+and+inclusive+education+pdf In PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/demukaj-ruselevob-kupim-sazinovagux.pdfIn PDF document text
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/lovadoxamiwimubuxeva.pdfIn PDF document text
    • https://puwukozo.weebly.com/uploads/1/3/4/5/134587621/1809035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_5fab0c9718f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f8fe2bb412af.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/2103082.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/42898019064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e94f44a-1c2b-4cb0-ac3d-c7b51c404a26/foferedobigelumorowozowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1cfdc9-d756-4d8c-ae81-d9c9dc0833a2/davy_jones_plays_his_organ_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd74693-d672-4589-9631-bfd1dea53e82/prodajem_stolarski_freezer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9fd80f-9cd0-4452-82ad-6362e0a85caf/16109683658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec76ee1f-687b-4c95-ab4d-6b2cba01d756/98824857273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883b6472-4d5e-44d5-a19c-9befddf01797/60580433368.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_off0000b91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB91C 5252 bytes
SHA-256: 964465ec79889722464a86ebd4a380c01ea2e3eeaf178f7fedafda44b281371a
font_01_sfnt_off0000caf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF5 10740 bytes
SHA-256: 24e509793ac99bac632919f116c319eb22d2dfca3368bc3eb50b0bc062bdfa36

Open this report in the interactive analyzer, or submit your own file for analysis.