Malicious PDF — malware analysis report

Static analysis result for SHA-256 32713fe7d31f2fe6…

MALICIOUS

PDF

90.5 KB Created: 2021-05-16 14:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4c54e5eb3789431301ad67acb737f989 SHA-1: d4a5a23bb23ef427bdb2a85f6a851d6982d44d5a SHA-256: 32713fe7d31f2fe6e32baaada3f27ae9a3e42a624676dcf12f2a904405a1d02c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the document's superficial content about a 'singer stylist model' are likely pretexts to drive traffic to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://leonvi.ru/strik?utm_term=singer+stylist+zig+zag+model+457+parts PDF link annotation
    • https://govewusig.weebly.com/uploads/1/3/0/9/130969429/disegukenov.pdfIn PDF document text
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/6223979.pdfIn PDF document text
    • https://ginupegoforijef.weebly.com/uploads/1/3/4/7/134760486/dedubasofabujov.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/58a5e300614d8d9.pdfIn PDF document text
    • https://napufifibadabe.weebly.com/uploads/1/3/1/4/131406817/vunokikivixikipo.pdfIn PDF document text
    • http://getcreditreport.info/dadivoguzz7ek0.pdfIn PDF document text
    • http://hardcreditcheck.info/jojomiram5r7g3.pdfIn PDF document text
    • http://sallely.xyz/navewaretatasotabavofag3kk3.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/9616506.pdfIn PDF document text
    • https://wegogitizunivom.weebly.com/uploads/1/3/4/3/134369171/wifafifamatefafusow.pdfIn PDF document text
    • http://pesetatin.iblogger.org/jixisuzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxafedijumexir.rf.gd/48712158058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93258bad-592a-4c11-bb16-1e4fb5c150c7/2226324479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20bf1c4-d6ed-41ed-9e22-9cf1971b538f/tugizubuzalaxosisuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30af20c1-629b-4d87-8ba9-1cf367003d20/96975863026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160298d5-f74b-494c-af9c-2db5fbcb4282/how_to_use_husky_power_washer_1750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65f3a84-d4e1-42b9-8f11-31c71268fbb6/defending_jacob_episode_4_release_time.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC8 5824 bytes
SHA-256: e955ec4b1a1f7ea90fce66dde19296a0084c03502cf5d83bcc106f59c11720c6
font_01_sfnt_off000121a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 11040 bytes
SHA-256: fa8dc238b81a982d99da0f7642602c3d37a87914e5eb7a12ecd38930bd96c3bb
font_02_sfnt_off0001477b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477B 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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