Malicious PDF — malware analysis report

Static analysis result for SHA-256 127aac52e8002b18…

MALICIOUS

PDF

73.3 KB Created: 2020-12-26 16:34:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e8bbe8c0e1b322410421b92d61c94806 SHA-1: 1aff023b2937a4fdc12a76de9ba4a51d12c410fd SHA-256: 127aac52e8002b18e388428b3c2d4ab435954a40f83483e27e931bd647fa0fbc
244 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous links to external websites. Several of these links point to known malicious redirectors or are part of a link farm hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The file's structure and content indicate it's likely a spearphishing attachment designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://gettraff.ru/aws?utm_term=avgn+adventures++pc In PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/pogibatajote_rosirorotow.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/5870292.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/810592.pdfIn PDF document text
    • https://rejaduwewuwuga.weebly.com/uploads/1/3/1/8/131856140/gason.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f8bf5bb243e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f894e7417d6f.pdfIn PDF document text
    • https://koxewezadopu.weebly.com/uploads/1/3/4/0/134017906/6830754.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490138/normal_5fe43302a4d35.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/juverizun.pdfIn PDF document text
    • https://tobotegitemusir.weebly.com/uploads/1/3/4/6/134651307/lodoka.pdfIn PDF document text
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/wunisif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fb9c149e205a.pdfIn PDF document text
    • https://kivutafiderok.weebly.com/uploads/1/3/4/5/134598466/4626296.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/79bee4e2-d566-4205-9de3-64477b3242b9/10007478316.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/binding_of_isaac_antibirth_cheat_sheet.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_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 5260 bytes
SHA-256: 8743fe6f354fc32ab93f3fbf628d9d5eb450da2213e0fd5e7c2d59f9dc9ff757
font_01_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 10496 bytes
SHA-256: 620f76e51c85448cc6869d381636206bde7775bad10c3eb0cb23d2744402a4b2

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