Malicious PDF — malware analysis report

Static analysis result for SHA-256 03254ead91307b48…

MALICIOUS

PDF

78.0 KB Created: 2021-03-30 22:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3137ade868a172b2786d3fd6373c0cab SHA-1: 9a1ed8f2b3f7406d3ea041c7fc83d5c6cf83c204 SHA-256: 03254ead91307b4832ed99b99b1ef26d60895c7efae56e6d2cd7320ee599e76d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains keywords related to 'ielts band 9 reading pdf', suggesting a lure for users seeking specific content. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://golowaki.ru/award?keyword=get+ielts+band+9+reading+pdf PDF link annotation
    • https://cdn.sqhk.co/fezivabuja/ibjggg5/5583857787.pdfIn PDF document text
    • http://nupifijaw.getenjoyment.net/buderus_gb172_24_kw.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/agile_organization_definition.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/8530099528.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/0afgjiK/53941233203.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/58677021479.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/zosidunubazozuwitad.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/779227474.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/percy_jackson_movie_3_watch_online.pdfIn PDF document text
    • https://nizerekudoni.weebly.com/uploads/1/3/5/3/135383630/8886500.pdfIn PDF document text
    • https://cdn.sqhk.co/joxudilabi/5ghzdhg/new_movies_mp4_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/7icgejc/bound_for_freedom_book.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/hijdfmd/86516500168.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/gvXgghi/love_story_games_royal_affair_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/fejxGsl/lidonugipovojikevis.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/sidatosaminu.pdfIn PDF document text
    • https://wijununag.weebly.com/uploads/1/3/1/4/131438003/8527402.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/adverse_opinion_audit_report.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/zedazibeje.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/79880528999.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivonupawidam.atwebpages.com/1099649542.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_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 5536 bytes
SHA-256: 94ded81ed169aa758f7f1e41fac7ec3b0b723a92942a1b83afa3ecdeecfdc354
font_01_sfnt_off000104c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C4 11152 bytes
SHA-256: d2b198e47339362f1fbeea1cdffd26e116f406848e9fcb19fad9293381ae51f9

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