Malicious PDF — malware analysis report

Static analysis result for SHA-256 6930fdc91be13cdc…

MALICIOUS

PDF

76.5 KB Created: 2021-04-12 11:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d89de87dd2564488b65878092d247d0c SHA-1: cf7c38ea443b847a7fe74cda374fc4c39b20ec99 SHA-256: 6930fdc91be13cdc61ff5f9f625d57cd7965f812d062e8977c38b7e745aa5b82
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings, but one specific URL is presented as a search result for a common item. The document body is heavily obfuscated, preventing a clear understanding of its specific intent beyond the lure URL. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://seumenha.ru/strik?utm_term=allen+roth+ceiling+fan+light+bulb PDF link annotation
    • https://fuguweraxawu.weebly.com/uploads/1/3/4/6/134684603/lajuwe_xosizujale_memumijumegop_zorogewe.pdfIn PDF document text
    • https://votokivefanatu.weebly.com/uploads/1/3/1/4/131453133/juzired.pdfIn PDF document text
    • http://7gusevshop.space/nutaboligupojomuftem3.pdfIn PDF document text
    • https://ronifevux.weebly.com/uploads/1/3/4/7/134737402/7fc5056889.pdfIn PDF document text
    • http://djami.ru/jazogizevefadizoz5xol3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wejuvono/guide_du_routard_birmanie_fnac.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_55c125c8914145aaaaa74d63be348276.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/asuran_bgm_ringtone.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_73a2378f8cfe49a486e823bfb2318b90.pdf?index=trueIn PDF document text
    • https://b5f62e6e-b620-4b0e-90dd-fa81fc7fb5c2.filesusr.com/ugd/18d815_7c1830524f874c34be2af3827be57db2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/renekolorepexixil.pdfIn PDF document text
    • https://0524119b-9543-44d4-a9c1-6a2a85ae2681.filesusr.com/ugd/b12506_c222872b2de14d69b05dd488e12d6d34.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_97714f7de3544437bd4baa83ca010e11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83853bd8-fd03-458f-bbee-97a9d9be9ba6/tage_frid_teaches_woodworking_download.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_027f2c6eee8d4c0989a3e145f961d6ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kaxukok/75226087812.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_c4ebd871c4754d5a8721b315133c5a72.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2d648e-977f-4edf-901b-b62f21cef85a/11677367304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4a9cb7-6b1a-4d45-b1f4-1bcbc04492dd/5708251762.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_5c74632420fc4e759cfc4e08482deabb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/718cf913-f3a2-4778-af74-bcabc42c6998/pirusaj.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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 5096 bytes
SHA-256: 822114ae52a7d9ea8c906fb53f2ed384430abc261a1d9e4678c4f5b28741f1a7
font_01_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 10840 bytes
SHA-256: c46f0e552208a7cd8ffb69ef3eb0f800525d14d07f1e33f7111f857e1f24c446

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