Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3b054166d323c8…

MALICIOUS

PDF

79.5 KB Created: 2021-03-14 10:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 898b95d0d1add0a897d33a0f339ea960 SHA-1: d3dd72fb7e92b816500d16891eece2c3b02ef36d SHA-256: 2d3b054166d323c8e764ab21b0219b0f438f3b6126a1c3a316fba53b7b8cba71
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or are used in link farms, suggesting a phishing or spamming campaign. The document body, though heavily obfuscated, contains keywords related to design resources, likely serving as a lure.

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
  • 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://xezojetit.ru/123?utm_term=best+business+card+designs+psd+free PDF link annotation
    • http://dalidusiz.mywebcommunity.org/introductory_statistical_mechanics_bowley.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450624/normal_5fd1a774ba83d.pdfIn PDF document text
    • http://siondez.ru/rovukap4j7gv.pdfIn PDF document text
    • http://kellys.space/acronis_true_image_size5eu7v.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/tom_clancys_jack_ryan_season_2_release_date_uk.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/troy_bilt_generator_6250_oil_change.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5ffa290a2092b.pdfIn PDF document text
    • http://seamanygau.best/fisaxisufamazibizewikezud15ikr.pdfIn PDF document text
    • http://b0xberry.online/a_nightmare_on_elm_street_parents_guideo49pd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_6026073fa088e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fd2d191e6474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458623/normal_600204270f5b8.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/free_download_kitab_barzanji.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
    • https://s3.amazonaws.com/sowirutelevolur/lbbb_in_ecg_report.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/lulesek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c335c81a-a98b-4eae-9d4d-b2241a4e6f4e/wipokalegagatidutixerab.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/96221700807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773739bd-ba4a-40b7-9a61-53526fa31bc8/rafajudaparojamabosopoga.pdfIn PDF document text
    • http://pujumek.myartsonline.com/bnf_2020_free_download.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/36253539985.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

Related samples 3

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_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 5252 bytes
SHA-256: b13bd9a181430f3f50fb8c9b4ae7099934b5b1f47d5eccbb5d5124c7a28922db
font_01_sfnt_off0000fed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED2 10732 bytes
SHA-256: e1eba713112e421edd3b466f6ea89a4422437102f1e3434f29993b6ba6387622
font_02_sfnt_off000122a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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