Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0321b1c66b903e…

MALICIOUS

PDF

75.2 KB Created: 2021-01-03 12:14:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a805a79757c916156f8c40555d48db37 SHA-1: d76509407f57e07bff545cc48af70176dbdc673b SHA-256: 1b0321b1c66b903e8f54da70a3a775d6f22c4b2dc6a6220ed867ef7c3d228934
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a phishing lure, specifically using an image to redirect users to an SEO redirector. The embedded URL 'https://traffnew.ru/aws?utm_term=emotional+video+song++hd' is identified as a high-risk indicator. The ML classifier and ClamAV detection further confirm the malicious nature of the PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffnew.ru/aws?utm_term=emotional+video+song++hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500692/normal_5feb31a5f30d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fcb5ef241066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f9d09039a609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5faf0bd92b086.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/fuEmhcF/scary_granny_doll_the_horror_game_2020_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gapirofi/SMXgxjc/flying_bird_blink_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/fTicZYk/tropico_6_el_prez_edition_vs_standard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5fb756ef3ec82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5fa657da1b350.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/Chigew4/tepagumagiseput.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8732b2a1f87.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/sabegokek/42157286256.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/18001788008.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 4

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_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 4948 bytes
SHA-256: d10b01ec937c1bc54d7233c8d73253d14d6f154b448c000926d81011095f4f51
font_01_sfnt_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 10272 bytes
SHA-256: f699f5c8e3df59becdad4c5f2d4322e621da70ea64be7dd7b81ea17def74aca3
font_02_sfnt_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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