Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f458dda67dec8b…

MALICIOUS

PDF

78.9 KB Created: 2021-03-30 15:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fedd2f2551c72167ab1381f32e823633 SHA-1: ca9c3dfffee4a6d5f1de545e932663cbb5e56d15 SHA-256: 34f458dda67dec8bbd6b41a06553252f9971d7169ba8248be34a55e1eeaa3b76
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 detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'maypoin.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'modern engine blueprinting techniques pdf download', further supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/award?keyword=modern+engine+blueprinting+techniques+pdf+download PDF link annotation
    • https://cdn.sqhk.co/jepipovi/cyiijfZ/razer_kraken_headset_xbox_one.pdfIn PDF document text
    • http://ximikilanad.22web.org/dudoteravavowesoker.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/Qifd0Dk/22030605844.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/wikuzusasuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_600526f63617a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414489/normal_6007654def92c.pdfIn PDF document text
    • http://walijexaleveva.22web.org/76559288789.pdfIn PDF document text
    • http://wumorumomu.22web.org/99766129844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_6032570fd7ffc.pdfIn PDF document text
    • https://cdn.sqhk.co/derilalovate/BBrjghj/tetazosoxu.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/cc0dd060-690e-4e71-b472-5add9371be04/fikofuzetefifir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2841f4c7-bb0d-485a-a24b-d14bdd998979/15912079155.pdfIn PDF document text
    • http://zokekoja.rf.gd/88531076774.pdfIn PDF document text
    • http://fedasumenusum.rf.gd/zutulejofilemaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3e7b83-b316-49e8-8b8d-b514e4d457c1/44757708583.pdfIn PDF document text
    • http://nitarerot.epizy.com/administrative_assistant_training_manual_template.pdfIn PDF document text
    • http://dekuroveki.rf.gd/81125965695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bec1be-82c0-459f-8e00-03c246b48ff3/monster_manual_2_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/kadawuzaliroja.pdfIn PDF document text
    • http://renaxodemebi.rf.gd/bengali_to_english_dictionary_free_software.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/vekizevokolinidebajir.pdfIn PDF document text
    • http://goxabobuti.rf.gd/sejezonusoveg.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/7957177386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e8b64d7-f207-42da-aa0d-64a2fbac5536/mahindra_tractor_wallpaper_download.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_off0000f405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF405 5780 bytes
SHA-256: 91c9416cf0b779d452ea73a507c607f46a9bd86a056c36fa2a3feb8fad495563
font_01_sfnt_off000107c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C4 10724 bytes
SHA-256: def63921a53e6006ae806d35d1b6c302f231661503aa3d2aee5b9c060aa57b0d

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