Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a6572c6e1f59a3…

MALICIOUS

PDF

66.1 KB Created: 2021-02-18 02:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eff17c10e92ab6efbb7c00d8f5c24c68 SHA-1: 384f63ced7b3d845913d79534a6c4b9311ca2853 SHA-256: 98a6572c6e1f59a3d90abe719f90ddd5496013655a98115bf4445261828be117
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure with a call-to-action phrase, directing users to an external URL that appears to be an SEO redirector. This is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs suggest a download or redirection to a malicious payload.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+open+top+of+speed+queen+dryer PDF link annotation
    • https://cdn.sqhk.co/ributexovek/GicysfY/39206337858.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/higdKjg/business_travel_and_tourism.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450353/normal_5ff57ee088f49.pdfIn PDF document text
    • http://begdas.space/59249682709gqknp.pdfIn PDF document text
    • http://dunetetemob.22web.org/86689077182.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/hbfgiD5/powerline._io_world_record.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498978/normal_60178770278a7.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/WUn8F3f/wwe_battlegrounds_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/LGje9jb/pujasofemipuvikevozuku.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/gShftha/33378040030.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/jZjghgy/white_color_captions_for_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/S3L6Vjd/amazon_prime_video_new_movies_october_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381735/normal_5ffa7030ab107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528915/normal_5fcbffbc36aa9.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/Ywibji3/41756990386.pdfIn PDF document text
    • http://hookup755.fun/skateboard_tricks_to_learn8p7nj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 5

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_off0000c81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81D 5076 bytes
SHA-256: d5b6cf227c0459428db3d59acb8590b85df6526e93248e312e494b120de9ee5a
font_01_sfnt_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 10032 bytes
SHA-256: 4df039cee23e2b0020455535871da1656e2fa80a76937407af0ca9403d1adfa1

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