Malicious PDF — malware analysis report

Static analysis result for SHA-256 6194ecb6cf785607…

MALICIOUS

PDF

75.9 KB Created: 2021-03-06 05:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ad5c4b50fd8899595d47aef363cdbdb4 SHA-1: 464e67e127ab874423b095934e51e4067469cb32 SHA-256: 6194ecb6cf78560712583bb848ac349c1c6e6262494cacbad5a320846fc25f52
136 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 related to dryer repair, which is a common tactic for phishing. The embedded URL points to a redirector that ultimately leads to the malicious PDF. ML and ClamAV heuristics confirm the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/strik?utm_term=how+can+i+make+my+dryer+stop+squeaking PDF link annotation
    • https://cdn.sqhk.co/xaselavub/dzjhlyT/masewuvinojepu.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/rahh8W0/paputo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444356/normal_60000f8ff1aa1.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/hfjjBic/download_the_tribez_build_a_village_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5fda97f5a882c.pdfIn PDF document text
    • https://cdn.sqhk.co/wenudiwome/dibiack/princess_first_grade_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/ghE0gjv/hill_racing_2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/Y3UmjbK/11959299289.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/Xhbieje/futovafemiwowixatonaxax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_601901e028549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mozedijiz/dupinuzatojipasukapisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7b3ccf-872b-4030-b4b1-aaaea492e53b/64042836165.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/runaxofexarelilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4097350-03a4-475d-8d26-62151f4d5b38/vasipapefunasilesawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ac0237-203d-4b61-8a6d-844c1586bba0/82551004542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/493cbaf3-76e1-406c-b6fd-85a0ba424d0f/zokufomevoriragadutesulon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696cc0b6-ccfb-4a32-9298-4d707f1b4b6a/jusedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE59 5588 bytes
SHA-256: 7bd5941a25ddd3db18b182705c4acb364c5475c1587a4ee2efd433c7a6726d26
font_01_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 10152 bytes
SHA-256: ae6b2c3bf033bddfc7e2df0a593a8d4920eff51619575b8b918eaf26270de060
font_02_sfnt_off0001141b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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