Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3da879ca82e8829…

MALICIOUS

PDF

82.6 KB Created: 2021-04-01 01:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5092928aad67e25deb5c8f367f66cc74 SHA-1: 0df998beb4d55fb200f0b6edda9715a9324b8794 SHA-256: e3da879ca82e88292a1cbd87c56aff7fc43ac100dd381807688827f0b9933da6
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains high-severity heuristics indicating it is a phishing lure, specifically using an image to redirect users to an external URL. The ML classifier and ClamAV detection strongly support a malicious classification. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution.

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/award?keyword=pin+diode+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467573/normal_6030e782aafb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_600c273eb7b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_6037432a4cca2.pdfIn PDF document text
    • https://cdn.sqhk.co/lululitoj/idcWhbG/geraldi_s_fayetteville_ar_catering.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fdd75f83edff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fce2da13cdfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_600582a4b2f18.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/hf6DPja/paper_and_leaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_6048521596ce5.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/930d77b2-ff3b-4512-b406-2cb7e77aa3c1/4740436866.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/florida_residential_lease_agreements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bdcb4d5-a9d1-4d3f-bdd5-7017ec8bf378/18048238064.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/learn_astrology_in_tamil_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/animal_wise_virginia_morell.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/fatopakotawezutisu.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/90529110613.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 4856 bytes
SHA-256: ebaffa8cceb92dc630373ea2a85d51284179d01335dc6f5d36d9908ba4515319
font_01_sfnt_off0000ffee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEE 12160 bytes
SHA-256: 99787d66b96130eaf20c34ef89ce4aff1169e5b010fab241e03979ce2e53cec3
font_02_sfnt_off000128db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DB 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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