Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4f402e8a1b7b89…

MALICIOUS

PDF

75.8 KB Created: 2021-04-06 22:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 81cd27e99abf0465bfde7df4a3bc4d66 SHA-1: d6d9318261ad67781a6dcc7dc182545dfd26378b SHA-256: 6b4f402e8a1b7b89d3f524e76a969b9282eca06f82f1ec4bc892c70d3f9a0e92
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, and one critical link identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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.
  • 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.
  • 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/strik?utm_term=mr+sandman+tab In PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/piromukidunazasi.pdfIn PDF document text
    • http://erogan24.website/buffers_in_biochemistrye3yyh.pdfIn PDF document text
    • https://woxabofubal.weebly.com/uploads/1/3/0/7/130739449/fiwisawuluwex.pdfIn PDF document text
    • https://xoxilorimisutoz.weebly.com/uploads/1/3/4/7/134705863/nobik-fudoxi.pdfIn PDF document text
    • http://tortomsk.ru/lixizamerigeromasegipil2g4c9.pdfIn PDF document text
    • http://tulidefupevewub.iblogger.org/71339024649.pdfIn PDF document text
    • https://wajupera.weebly.com/uploads/1/3/4/7/134763514/cc5901068a.pdfIn PDF document text
    • https://luroxonigin.weebly.com/uploads/1/3/1/4/131406321/dasotawi-ragufitugof-gizumu.pdfIn PDF document text
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/dixazanivulo.pdfIn PDF document text
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/wasezukexutoxibidad.pdfIn PDF document text
    • http://levelupguild.com/the_human_brain_colouring_book0lydj.pdfIn PDF document text
    • http://shoop-fe.ru/samsung_syncmaster_2333hd_tv_manualfvlr3.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
    • http://foxojowekalorut.epizy.com/al_arabiyyah_bayna_yadayk_book_1_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93cb12a-48bd-4a74-9c2a-4cc8b4cbb568/mississippi_drivers_license_office_jackson_ms.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/17935166942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a076c57-a91f-4b26-8c31-e31852361bab/susutupituku.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/33450132107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada73af8-3b69-4876-aa97-994d633272d4/94391003960.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/zopozipezemane.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/xizuxitiwaxadutofifoxob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e1287c-9233-4693-8817-cc1b58ebfe91/is_the_roomba_960_good_for_pet_hair.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/vex_iq_clawbot.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_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 4596 bytes
SHA-256: 1ddab52f2f75b098fdfbf204cbbd8d7d51d0954b7228ab02941786f5e62e2e49
font_01_sfnt_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 10576 bytes
SHA-256: 194a2ae5412fdf3c59117343a1b2f2ee367ab3bfd172ddcc369880960c0c71d0
font_02_sfnt_off000113bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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