Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1d857e3b76b65f…

MALICIOUS

PDF

99.4 KB Created: 2021-01-06 19:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d3ddfb3328d28c3e610d5ea53eb30b8c SHA-1: c154965641db52c123522ea52afab409b9dfa80f SHA-256: be1d857e3b76b65f02a4729c4be4d165c3d10deff69530d41503ef81cf0ad024
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://trafficel.ru/aws?utm_term=bangla+font+sutonnymj+bold+free', suggests a lure related to fonts. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are consistent with a malicious PDF designed to redirect users.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/aws?utm_term=bangla+font+sutonnymj+bold+free PDF link annotation
    • https://bokasaveti.weebly.com/uploads/1/3/4/7/134725866/bozibegasinavi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/3ggjhNf/51878940105.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/aih3hay/62640776576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449973/normal_5fcfaeaf839ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367273/normal_5fc433fd279e5.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/gcP2jea/bet_cost_roku.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/0gcWcif/mecoo_live_match_meet_enjoy_realtime_chat_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5fd0901ced63b.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/3gghfgj/82504301038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divexikav/39870709404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e2851a-51b6-4407-b411-44fbb751033b/gta_3_download_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/vumerepubadinedo.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/mozilla_firefox_49._0._2.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/19865780152.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/vafufabatifejodepifid.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D3 5592 bytes
SHA-256: 7ebbec63ccc763f6951f2b453b4fae389d3c6f9ee17c4fa68df9e1ca39239f79
font_01_sfnt_off000137d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D1 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00014334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14334 11504 bytes
SHA-256: 04127cf4be5ab15b5a26b67bf304b730c092ebd6c623f4ac74affb7ef4b59487
font_03_sfnt_off00016aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AA7 16144 bytes
SHA-256: 31dbd5e8da13f8a98284bd4d95e99806f0ac85345f2acff36cb761c6c6ea250a

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