Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea22f1205f69381…

MALICIOUS

PDF

67.0 KB Created: 2021-03-16 03:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 367dfe4e873c3668513d2d68464abf3d SHA-1: 84ba9de8e3b4ca9b1030f8762d54573ab92d4480 SHA-256: 2ea22f1205f693815881d65232123bc715147d6ca23e8c5cc960e6c1aab1a92c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to various PDF files and a suspicious URL. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=world+war+2+rise+of+dictators+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495849/normal_603a9462beb07.pdfIn PDF document text
    • https://kufoxigokutef.weebly.com/uploads/1/3/1/8/131856815/sorokalofuvusux.pdfIn PDF document text
    • http://olymp-trade.top/tomemanuthxlf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489045/normal_5ff9726c67842.pdfIn PDF document text
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/dexoliganopuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422392/normal_5fcec0ef13433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_600e94fc22120.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464850/normal_5ff884c129687.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486041/normal_5fdd9e0c15799.pdfIn PDF document text
    • http://metalllift.ru/96745143254orfvh.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/burulazo-wizitewiluzuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497372/normal_5ff40c3956064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_604e247ac2558.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/gurotonobarefeboref6gxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_548d84aa833a478983dfc9c124f52ac0.pdf?index=trueIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_6e2cf5094da647838de23752a7481685.pdf?index=trueIn 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_off0000c977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC977 5408 bytes
SHA-256: d9cfbcdea3f1accdc4e5cb14e2cef932c426be720a03990a85e8ee6cdddf143a
font_01_sfnt_off0000dbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 10216 bytes
SHA-256: a9c4fff99912fdc88471f2343a7282bb598853b59fc1d33cbbb7fa1999f5e771

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