Malicious PDF — malware analysis report

Static analysis result for SHA-256 0627e47d0b43795b…

MALICIOUS

PDF

89.0 KB Created: 2021-04-01 14:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4f44fd63c2888cca279b5958fd779561 SHA-1: ff49304d0fe4404e49890c8cdcabdd75a33da79a SHA-256: 0627e47d0b43795b730e9d1b4d0915fcd4d75b75a6be6239f4f8c498f6c99ef1
126 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=ableitungsregeln+tabelle+pdf PDF link annotation
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/99feb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425501/normal_6001f489610f2.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/haggrET/77088681127.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/MjjlZJO/download_latest_call_of_duty_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/ggjV81j/rukonufuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_6032beb686ba9.pdfIn PDF document text
    • https://pimusaxasoj.weebly.com/uploads/1/3/1/8/131856122/jibonafu_jetuwanesepe_midutibakewi.pdfIn PDF document text
    • http://arfeshome.com/what_are_you_doing_answer_english8frpf.pdfIn PDF document text
    • https://xavaxulesunup.weebly.com/uploads/1/3/4/3/134379996/xusejezavuxum.pdfIn PDF document text
    • https://gafexevuwemab.weebly.com/uploads/1/3/6/0/136091136/paruvoxawodoru_goxofi_jededabizod.pdfIn PDF document text
    • http://zanartcc.net/jomegakaf2pv7n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_603f347492b18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fe085e73343c.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/21a53d63-e06c-45be-b3a8-157394ac0049/bash_script_for_loop_two_arrays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1de4de-d775-4bf6-a493-a2da297c3538/my_son_my_executioner_theme.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_3cde45fa959e47e9ba43ba0c175ac1af.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2089860-e256-46a4-a58f-c87b97b535c2/givinuzo.pdfIn PDF document text
    • https://be9ca920-c372-4566-b00d-544f92814f3b.filesusr.com/ugd/f0c5a9_e337ada0678e45889a2b1d414ee46131.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_d071b1493e31492f8c5d179a915d3d6d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd478a0-310d-471b-961e-d3041df6ec05/14417289457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744ed22c-be04-4f22-948d-70e41cd18673/creative_sound_blaster_zx_pcie_gaming_sound_card_review.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 5336 bytes
SHA-256: 35050029ae231886118f2a840d4794371640b6c4d45d9fdf9fbd163f9004ebf2
font_01_sfnt_off000117c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C2 12188 bytes
SHA-256: 39ca21ceca9a7da32a276c8dc9ece2721aca3faa6210bf2fbc9b37d889293bde
font_02_sfnt_off000140e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E2 16180 bytes
SHA-256: 56798d3f75f456f2415296f99f554ef45ab1f9fff5885d9b7e46273c9cfc987f