Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51bb402d53121b6…

MALICIOUS

PDF

76.9 KB Created: 2021-03-01 04:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1ad593d3a24df4aee22bcf9f755b6512 SHA-1: 017e682e42fda3c8d45f6059ec2abdbb78d79fdb SHA-256: e51bb402d53121b6103897be56c8ab799f51ff0d1ccc759d24736bf8749272a2
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_CALLBACK_LURE' indicates the document is designed to trick users into calling a phone number, a common tactic in callback phishing and tech support scams. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest it likely serves as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=sp2+construction+final+exam+answers PDF link annotation
    • http://drive4mclanemilwaukee.com/94121241746bvg52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_602aa471740f5.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/voxijixafurosiloninit.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/scythe_miniatures_painting_guidetjx8p.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/bapemojubar.pdfIn PDF document text
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/cb359af079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_6038d620ac58a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_600482a7d2a3e.pdfIn PDF document text
    • http://xteenware.online/vudugiferimumezumunatugabs8q5p.pdfIn PDF document text
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/jewagedelezogopa.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/68050260105.pdfIn PDF document text
    • https://pimapavidi.weebly.com/uploads/1/3/2/7/132740410/votafiso_pukuzojotizugof_rimalamega_nagugok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fccf431455b7.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://jetotajasavesi.atwebpages.com/54960844721.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/talk_to_me_in_korean_level_1_audio.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_off0000dfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDA 5440 bytes
SHA-256: c7fb2c4cfede3d582ae94d51d547042416d6eb95f01a47b4d034dec9851a9458
font_01_sfnt_off0000f248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 11044 bytes
SHA-256: af7d898fa908a732c9bd555ab4ef60a23c9762ae6bcf0a9de3594609f403564a
font_02_sfnt_off000117f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.