Malicious PDF — malware analysis report

Static analysis result for SHA-256 429494d786509726…

MALICIOUS

PDF

79.5 KB Created: 2021-01-06 19:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 116faa59fc9728c896935f0c230d672d SHA-1: 9e27bc8dcafa4e9c7c13046201dc0e13ad30a7e4 SHA-256: 429494d786509726cf9ae5209993fa90500598538602d88341c889f6e1ada3c6
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one specifically identified as a redirector for 'free-download phishing'. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a phishing or malware distribution attempt.

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://trafficel.ru/aws?utm_term=aws+pricing+cheat+sheet PDF link annotation
    • https://zomomawiwupid.weebly.com/uploads/1/3/4/3/134385308/5330425.pdfIn PDF document text
    • https://jojonawizofobu.weebly.com/uploads/1/3/1/4/131438175/ketur_vumemefi_dodotidilejuse.pdfIn PDF document text
    • https://siwovipon.weebly.com/uploads/1/3/4/7/134705210/liximaje.pdfIn PDF document text
    • https://sufusazowuk.weebly.com/uploads/1/3/4/3/134311692/kemipavutumibuwu.pdfIn PDF document text
    • https://nokemodikobo.weebly.com/uploads/1/3/4/3/134308311/toradozidomelojofafa.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/jumedemimo/peter_manos_in_my_head_lyrics_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/43129442287.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/nokifux.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/vukezoxakominaxawagexop.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/36264205612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4540c9-ece8-4090-8ec4-37b54d3ce245/56272948644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84f5168-87fc-4ee2-8859-e0804ab61554/61540160114.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/933642925.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/94214730592.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/xutoxawowor.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 5244 bytes
SHA-256: e5dad3e1ac6e86b9a33f0362af107e8d5d85ae974af5327facc9b07c10410f67
font_01_sfnt_off00010bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 10960 bytes
SHA-256: fb3ca67b3f00fe943d5795e858ef6655f14e549e9100814a47a4c9607e1ba173

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