Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8802a14113be83c…

MALICIOUS

PDF

77.9 KB Created: 2021-04-06 00:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1c1cdaad9ce6c3c9b42772e36b5f2454 SHA-1: c0c093296b7dd48e071586769455202982d285fe SHA-256: d8802a14113be83ca3b1a3f1948c2b2cb647669461557346fb22c0f4bf87439a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The document contains a link disguised as a free converter, which redirects to a suspicious URL. This suggests the primary goal is to trick users into visiting a malicious website, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/123?utm_term=mp4+video+to+audio+converter+free PDF link annotation
    • https://cdn.sqhk.co/bapisolel/micifhc/nolexejudasifukiden.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/hdgcozX/jegozokogiporoxegologe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_60196d38d2367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478408/normal_600d46e211425.pdfIn PDF document text
    • https://cdn.sqhk.co/wagejino/jczgegH/22779110274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_60266a7f1fbd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454046/normal_5feecdb7cd92d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380882/normal_5fe00c5a3ba17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e31ee03e-2eb5-45a3-a7d8-123a764c8c18/dexegiwezobekudogozuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033f2629-d46d-4011-9edf-bf25075603ab/4294951466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcb753f-c531-4aea-b965-a4a9c545d1b2/bonifeverire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f87d2f-9d7b-47bb-80e7-3c0640057cdf/gakifexifofinawovanazuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b923b308-1067-40cb-bd7f-e5a3689b8246/anderson_sc_dmv_practice_permit_test.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/rezatisuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c958ee-ebe5-439a-846e-73a8efa3364b/time_warner_cable_remote_to_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/adobe_premiere_pro_cc_2018_mac_crack_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5bad480-bffc-4fa9-a94c-0466d7d70915/43788682060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf5a746-23ec-4668-932a-beec1e1a353f/dabineke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c73b15-8eb5-4a25-ae07-802d8e99218f/navy_technical_manual_numbering_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81d5357-2cdc-457c-ab2e-1c53fe79fb79/vunigazopogolusifel.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 5092 bytes
SHA-256: e619b7cbd6214ac7970bcdb43386870826e3b352f12aee3ab9cccce5339652b9
font_01_sfnt_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 11164 bytes
SHA-256: ed06781cc53c126c3fe01fe2c279cad444a2faab515b5bef004104f5e69b14c1

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