Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aae03f17124e39d…

MALICIOUS

PDF

66.5 KB Created: 2020-12-07 06:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cb5f0f41d9dbfbd3d964f8d6e8ecf757 SHA-1: 00cdbc948aa02a40f42b62700225b6784c96f736 SHA-256: 2aae03f17124e39d74a7a62f1587246e09fd75d4fa5a1719f85602699009c283
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content or for SEO manipulation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafftec.ru/123?utm_term=crosby+middle+school+louisville+kentucky PDF link annotation
    • https://tevigopodasipa.weebly.com/uploads/1/3/4/6/134678542/d8a3de04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460686/normal_5fa8317c06583.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/4ffb9762482.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/gaxelos_miruzoduze_nekonem_rebaguxok.pdfIn PDF document text
    • https://pasifoberili.weebly.com/uploads/1/3/4/8/134881239/vujaxuxewilezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5f8eb6c73377f.pdfIn PDF document text
    • https://fofifiso.weebly.com/uploads/1/3/4/6/134613093/xakidebozaraxoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fb73d63a5498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_5fae03eadb76e.pdfIn PDF document text
    • http:///www.s.a.s.a.,.../In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e925ea4a794d56451110/t/5fc2794be18c5c478e4bb0c5/1606580559394/68837746472.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/xalijiwowofopup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fee6afe-1917-4193-812d-f4b142782158/tebebox.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/cooks_essentials_cookware_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0610b6e-24b5-4b4a-b4f5-61031d45f02b/showtime_guide_program.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_off0000c940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC940 5240 bytes
SHA-256: 7f36f6113b82fc1f500335b7eadcee2362e62a4370044cbd2b3e08f72ae25278
font_01_sfnt_off0000daec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 10000 bytes
SHA-256: 08315beb04f1ef4fe6cc34252339a416f2e229ddb07fa5a848225d5bf1b0f5cb

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