Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfc474431fc32cb…

MALICIOUS

PDF

79.4 KB Created: 2020-12-28 17:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1845338dee575488a82454d1cb6056e9 SHA-1: dfae2e03f55fd6935ce550f5cb042e15b9b7d73d SHA-256: 2cfc474431fc32cbbd5f247408999345b821bd956b5546ec1c4259ef1ba65ec4
254 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including a known malicious redirector, indicating a phishing or scam attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into believing they have won a prize or are due funds, requiring them to click a link to claim it. The presence of numerous PDF links also points to a link farm used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/aws?utm_term=laura+garden+answer+net+worth
    • https://static.s123-cdn-static.com/uploads/4366312/normal_5fe0095b2967f.pdf
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9b12b4eab02.pdf
    • https://zuzotupewumu.weebly.com/uploads/1/3/4/6/134691050/nuwevunakalame.pdf
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5fe9c9a45320c.pdf
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fb771b1caab7.pdf
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/nenozabetukut_zajavo_weginivilexujo_sopifinudumofu.pdf
    • https://cdn-cms.f-static.net/uploads/4459631/normal_5fbb30aa4f79a.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdf
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/soxakogu-pemiboki-dasepab.pdf
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5fdbbb13c1e82.pdf
    • https://poxanada.weebly.com/uploads/1/3/1/4/131483305/d5c8c332f397f1.pdf
    • https://cdn-cms.f-static.net/uploads/4450243/normal_5f9f2dd3369e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tanikanaw/89812556645.pdf
    • https://s3.amazonaws.com/nunakixuma/33139651233.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f942.bin
d618b64939abd1eb262e29ffe9b55a47d92a5d3cedde29438d2f378c7ed17eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 5088 bytes
font_01_sfnt_off00010a9e.bin
be92a27d76cd2080da39108d43e5e9a3adea848b2a4a79fd8e6777dc604c2f82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9E 11228 bytes

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