Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17e43e71198e95c…

MALICIOUS

PDF

74.6 KB Created: 2021-05-11 09:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e7dbf576c0054ab9198330ee8f011a50 SHA-1: e824aac35ce2f78464770e1bf4768a9e13d33232 SHA-256: e17e43e71198e95ca3ff0259c44d634c55a8db91580a90f81ea3a9b82fb4bdef
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, disguised with a lure about pregnancy pain relief. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing page or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=how+to+relieve+severe+back+pain+while+pregnant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449187/normal_60414788cf1c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_5fd2f4bad0776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_60430f0ed5aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_601d0abc8d1b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425005/normal_6036141399a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_604d898942eb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387224/normal_5ffa58660123b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_602daa3f63df0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/duvulukamuk.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/al_quran_mp3_30_juz_rar.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/75333262625.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/sevoripow.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/pantangi_pambalana_worksheet_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/pokejupogodoniribu.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/salvaje_cambiaformas_tft.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/botulekulagivubumevom.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/avery_5388_template_mac_word.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/temiso.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/84175441852.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_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 5512 bytes
SHA-256: 4dcb89b4e0dd7982038bf99b214ef36b75acf972ed5d8fdb6e1453dd3c5d6367
font_01_sfnt_off0000f940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 10604 bytes
SHA-256: 9a706a441ff8f65c67c3b85d08e0579ef6f564337c630b41e646ae2fb791f5cb

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