Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d288905007432c5…

MALICIOUS

PDF

70.1 KB Created: 2020-12-02 07:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4c56405d62a4e77fb71ff637ed0edaff SHA-1: b0099569adf3db131613b8525096a56242fefa4a SHA-256: 4d288905007432c52f67d0148a5ac2751cdb2d64e5c42d0ed77b256d39938e0e
264 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a link farm on disposable hosting. The ML classifier also strongly indicated maliciousness. The document's content, though heavily obfuscated, appears to be a lure related to 'tv guide listings fargo nd', directing users to a chain of links that likely lead to further malicious content or phishing pages.

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.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=tv+guide+listings+fargo+nd In PDF document text
    • https://musimisipamorek.weebly.com/uploads/1/3/4/5/134594646/5556886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f959b7b7aec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_5fad88bee2907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_5fbcab64e09d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5fc21c6494a1a.pdfIn PDF document text
    • https://livekurot.weebly.com/uploads/1/3/4/4/134443702/gedawekegezurol_zaniridumuf.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/3af0492767d6.pdfIn PDF document text
    • https://nafafewite.weebly.com/uploads/1/3/4/3/134337559/ruxopenixebef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5fc61d9388846.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3878cb11b25c09b097d/1606218635870/dermalogica_intensive_moisture_balance_dupe.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/verb_exercises_with_answers_for_class_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd283d493e9e2166fa3f7e/1606232128090/kadobupozutujusari.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5515dea4a794d56626c14/t/5fc6da29b7521d608a33dbec/1606867499325/checkers_near_me_open_now.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0de5bcb0228a282afe8/t/5fc45bf96457125654c7765e/1606704125608/4_vedas_in_gujarati.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_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 4964 bytes
SHA-256: 4990e44e9386c54462b2833c6759d80ecb6de94ecc4e1bdeaad6a4404fc18e74
font_01_sfnt_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 10516 bytes
SHA-256: 3ec7115e3180349076506a586fda06dbafdcfb6f8306780c4e913afd0811b817
font_02_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e