Malicious PDF — malware analysis report

Static analysis result for SHA-256 808ba90da9962a02…

MALICIOUS

PDF

83.6 KB Created: 2020-11-10 10:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c86e8a243c7afc1db7c7f7a7d120f43f SHA-1: 258cfa954266ed2f91b937ae241426f8f4c32f54 SHA-256: 808ba90da9962a02bc7f870f388ff1068a2c88f5c97e531389d22734f276d09e
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/gunubeg.pdf.
  • 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://traffnew.ru/123?keyword=find+the+area+of+the+shaded+region+graph PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f97d0e4dd152.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/gunubeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_5fa9ea848eb36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5fa28b4fc1d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5f915a3048a24.pdfIn PDF document text
    • https://zutafemaz.weebly.com/uploads/1/3/4/4/134478566/nabujexan-favakof-bitujebidesod-bosagegasisu.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bunobu/zulimulodakagudanonurapaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/bujeje.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/97513405289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8883ab-e08b-4685-8937-1f4599d9ed12/nelev.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/vogajinupuwolomagutepumol.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/20434006733.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/9503500370.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f489.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF489 14020 bytes
SHA-256: b627c82ec453fe580521ed235f3bdd92541aec8a54ffa7a323999495595c7ae4
font_00_sfnt_off0000e2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 5228 bytes
SHA-256: 25b851d31a256ebac3ed586901afc469077d5d59f3ca6f03726d3787885615be
font_02_sfnt_off00011b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3D 10948 bytes
SHA-256: 3a0a05cb3578cae1e75a878574151c5da94db73c5e2f5aebcaf0cc611b1d23bf

Open this report in the interactive analyzer, or submit your own file for analysis.