Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd4e716d3c35469…

MALICIOUS

PDF

101.6 KB Created: 2021-03-04 00:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b2693ffbcb6c665b5b1333c4f401d892 SHA-1: de4e062e49d1f4af7d9d4a8df332e393dcebe0f2 SHA-256: 5bd4e716d3c354696241c44c781fd713d326e0e054e6399850c1181b30b68743
194 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, many of which are part of an SEO link farm designed to redirect users. The primary lure appears to be a free download for a book, indicated by the URL containing 'descargar gratis'. The presence of ClamAV detection and ML classification strongly suggests malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9574

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.
  • 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
  • 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://jumiwimov.ru/aws?utm_term=la+magia+del+poder+psicotronico+robert+stone+descargar+gratis PDF link annotation
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/d626c7411c2.pdfIn PDF document text
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/muxuwevapi.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/68f652ccee4.pdfIn PDF document text
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/9253633.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377938/normal_5fdf1bcf588e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_5fd9658648eba.pdfIn PDF document text
    • https://pigudoxuwupif.weebly.com/uploads/1/3/1/4/131437670/kotuzojek.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/chgjf4y/wojelamubekexinazoz.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/b6haCgc/95753928860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470699/normal_60313c2a20dd0.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/medaliwifufugel/what_are_the_different_elements_of_technical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/dogebikabutenerazipexid.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/wotawuwetod.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/bunap.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/linirivapavedonedowagijes.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/what_is_an_extended_metaphor_in_literature.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA6 5476 bytes
SHA-256: 0f8edb3587463769b37803c569d1ce599802db891096d866af8a60dc674d7554

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