Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfcd93c8ce3aac4…

MALICIOUS

PDF

198.6 KB Created: 2021-02-28 15:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0e0a599096266cdc8c143ffb57dc0a95 SHA-1: c34916f086ecadd30c27e694c225b89d2d2d7e1e SHA-256: edfcd93c8ce3aac49072a05fe40f630fc6fc146877ba97244f290e8719ba0a9b
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link disguised as a search query about microwave repair, which redirects to malicious infrastructure. This indicates a phishing or scam attempt designed to lure users to a compromised site. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=can+you+replace+a+magnetron+in+a+microwave In PDF document text
    • https://cdn.sqhk.co/temejikowewa/icqibif/63203358847.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/4ejdifq/jezowovemamumatim.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/tifemaju.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/55125643634.pdfIn PDF document text
    • https://voxisazemiruza.weebly.com/uploads/1/3/1/8/131871554/wanitamara_pifokojexolun_murebef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_5fee7596e9f35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_600121db9d47a.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ajjRghf/costumes_near_me_open_now.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/cFjaAhf/simple_shopping_list_app.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/yUigTBX/kodiak_bear_bites_nutrition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464068/normal_5fdf734af1c46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421612/normal_6038038996ee0.pdfIn PDF document text
    • http://liseravuziw.22web.org/beamng_drive_crashes_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/iguTzic/encyclopedia_brown_reading_level.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/4014099759.pdfIn PDF document text
    • https://cdn.sqhk.co/gimowiboxero/WXkhbDw/44979415507.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
    • http://riwugenesujo.epizy.com/nudidupifox.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/66953568535.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C627 5232 bytes
SHA-256: 8394721bff8638899e46fa76f342708e364b8820ec53314d6b873306ce0bab00
font_01_sfnt_off0002d807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D807 11456 bytes
SHA-256: d023e02984f1ae2f3da939e027de541fc5db5da55906d0b455b7bee23370344b
font_02_sfnt_off0002fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDE8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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