Malicious PDF — malware analysis report

Static analysis result for SHA-256 8383eeb05061c961…

MALICIOUS

PDF

100.9 KB Created: 2021-02-21 11:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3ac7c05d28f48dd4f0af27afde918f6d SHA-1: 5fef073181b54cef0e995659d0f55e89c82492ed SHA-256: 8383eeb05061c9613983126a452922e51efe6469305a526b5b4060d4c05f681a
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=chain+chronicle+apk+3.8.24', which is presented as a download for an APK file. This, combined with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the presence of a malicious URL and the document's deceptive nature are sufficient to infer a phishing attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=chain+chronicle+apk+3.8.24 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_601ed1d005496.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418788/normal_60025d0b2aa31.pdfIn PDF document text
    • http://kpovli.ru/2003_club_car_ds_parts_listpc91t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5fc6767b8a620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_5ff15157b873e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5fce08aca02ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5fec240b148ec.pdfIn PDF document text
    • http://swiss-gear.shop/92743552878lqdx4.pdfIn PDF document text
    • http://rat-red.space/cultist_base_doom_eternal_extra_livesdlnsa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_5fd1ee4eb39b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475379/normal_5ffd622250541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fdcf09ab8b4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462697/normal_5fc5737a11bd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vanepozimor.rf.gd/dumidenilevijatemuju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD5 32280 bytes
SHA-256: df1a52e6b7f8d40b525f8f0fe5d08703ada07b3a964b8f3f8ea5c67d410b3dc2
font_01_sfnt_off00014de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE9 5420 bytes
SHA-256: 5ebd7f65fe9595cec3d9e988eb243b92eb797480aa0080704a0090ecc103e4ac
font_02_sfnt_off00016056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16056 10728 bytes
SHA-256: 09ceddbe4a9a49579c92168a685fbef2cabba161abbb6a07a4e76267b6607de0

Open this report in the interactive analyzer, or submit your own file for analysis.