Malicious PDF — malware analysis report

Static analysis result for SHA-256 32213cd0a5ab63b9…

MALICIOUS

PDF

68.6 KB Created: 2020-11-17 16:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bd38358c16b1d30293088dd7dc7f9712 SHA-1: e3b5f65f325b1c54fd415590d18097c151d7884c SHA-256: 32213cd0a5ab63b923aaf4d943b4df6055e9477f9c0d92dfa9b26e88b8133ad2
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized content, suggesting a link farm or phishing lure. The primary redirector URL, 'https://trafftec.ru/123?utm_term=jj+smith+10+day+smoothie+cleanse+pdf', is used to disguise the malicious intent. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/123?utm_term=jj+smith+10+day+smoothie+cleanse+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403674/normal_5fa4ffb3abd29.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/samesuseliju.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/jijawososapuxur-kitirapir.pdfIn PDF document text
    • https://nenojidadexodu.weebly.com/uploads/1/3/4/3/134351563/bavatu.pdfIn PDF document text
    • https://benoralegofalaw.weebly.com/uploads/1/3/4/5/134581061/gasugekipan.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/jitimesolagun/beyond_comparetotext_not_found.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/49573513860.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/nekarefebineradelofip.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/kuwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea170752-53f5-4e94-a3ec-52d7613888ac/29990562819.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/arabian_nights_free_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/80679180008.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/gibafe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB821 5660 bytes
SHA-256: 60dc05c1a88dd5cb2612352e0392892521badbf573cc4677df7b3f01f62a36db
font_01_sfnt_off0000cb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB59 12724 bytes
SHA-256: 3e0c76556ddb4c072e8432403b57e95d8b891c81dafba4085fca1415b6aa57f3
font_02_sfnt_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 16116 bytes
SHA-256: a7b94f97b9497b482962a6088c52838fc4d6396c7535a08dcd3d8691766d53a6

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