Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1f86a2c6a94bef…

MALICIOUS

PDF

75.2 KB Created: 2020-12-25 10:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c109bf5b9a1d080543971f75b057b118 SHA-1: 798f77c042a79e3ec0ae1f7a74543a8dc73030af SHA-256: ae1f86a2c6a94bef47ebb90d462ed4d23eccc3a99358da8d7a730a6ada9b3c98
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many pointing to Weebly and other hosting services, forming a link farm. The primary URL, 'https://trafficel.ru/strik?utm_term=gs+race+suit+womens', suggests a lure, likely for phishing or to redirect to malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=gs+race+suit+womens PDF link annotation
    • https://luxefelukij.weebly.com/uploads/1/3/0/7/130775337/cb513cc012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489599/normal_5fc9a23f89db0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_5fadaab1c1413.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/memazagiwigokigon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f91e8bddeb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f8a1753e4611.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/mogepakofagogurelola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_5fdbe7d18e2a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f8bf6098a231.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/c7643326.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB22 5036 bytes
SHA-256: 51e45636ba4b8907ce10b0bc52859e11f4b34152e8dbcad797365c7911ac7394
font_01_sfnt_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 10732 bytes
SHA-256: 22bc9faa86bd7cf48fa6320fa1f053d1976f970952ef390a2b70d79a62d3e7fe

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