Malicious PDF — malware analysis report

Static analysis result for SHA-256 2540e2fc2aa672e3…

MALICIOUS

PDF

74.0 KB Created: 2020-12-25 14:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9f974bd4819476f11de5ce7cd9d049e3 SHA-1: ec4727fe716622f4205d6ee3b0a25656fb8ae632 SHA-256: 2540e2fc2aa672e3ebf37d8979651e55fb2ad4d040e83d256ac2b9ffd96aeba2
264 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of embedded links pointing to disposable hosting sites, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' indicates the document may also attempt to trick users into calling a phone number under the guise of support or billing issues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=summit+view+elementary+waukesha+wi In PDF document text
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/23eac23237f9f.pdfIn PDF document text
    • https://nuxagaselupig.weebly.com/uploads/1/3/4/0/134016775/c34cebc3e332a4.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/7963784.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/ia9vyYu/bomotunawitugojeguviwip.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/genuxim.pdfIn PDF document text
    • https://duvonejubuzal.weebly.com/uploads/1/3/4/3/134321315/gepimilidajesod_futuk.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/repal-pezobawug.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/31c2a4269624.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/8775275.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/Licicha/moweb.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/iQYgic4/sandisk_memory_zone_support_information_page.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/jfiehd3/diaphragm_pain_in_back.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/779a98d0-5a1b-435f-9239-3e3c30c7d08a/tefizajevixefovaduje.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_off0000e250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 5348 bytes
SHA-256: 9d99fdb4f4cacf23fc0b1bdcae70f6f0c02a33d3f24ff0e2b2c0b7f8efd16b77
font_01_sfnt_off0000f467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF467 11432 bytes
SHA-256: 563e8ef80080193108a6531b041749cc3e3f6f693e7aa70cc8b9d46bad9e0d9d

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