Malicious PDF — malware analysis report

Static analysis result for SHA-256 432c6eda1f66eaf5…

MALICIOUS

PDF

77.0 KB Created: 2021-03-19 16:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 14fe1244d27125586aa544623dcccc1a SHA-1: 79e17007711a0ce3592980cb00d268cffd657557 SHA-256: 432c6eda1f66eaf5991f5dbe6d94793e60ff632d528b95a086b6dd4480a9de7d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

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
  • 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.
  • 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://zajinet.ru/strik?utm_term=what+do+different+color+rubber+bracelets+mean PDF link annotation
    • https://gugajapu.weebly.com/uploads/1/3/5/3/135330564/pulaku.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/c3qooQG/2984824095.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/0be2845f5c3.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/gixicih/68752650934.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/5ggY7if/download_free_slot_games_for_pc_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/jfgfhiV/74759697506.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/8166210.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/zuxadoxe_xilifonegixal.pdfIn PDF document text
    • http://jexafagod.22web.org/sokakagaxosafijejogag.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/56fOqtv/free_online_racing_games_with_friends.pdfIn PDF document text
    • https://kododexupali.weebly.com/uploads/1/3/4/8/134888278/bapaxemamefup_gugasifepaxupu.pdfIn PDF document text
    • https://pobikutilun.weebly.com/uploads/1/3/4/8/134871216/tomuroxoz.pdfIn PDF document text
    • https://cdn.sqhk.co/dexavoba/WjgOBKS/87777741874.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/xipuvuna.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/fwihomf/vampire_and_werewolf_movies_and_tv_shows.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/6027144.pdfIn PDF document text
    • https://lodotimafigu.weebly.com/uploads/1/3/5/9/135981467/2618826.pdfIn PDF document text
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/zugodok.pdfIn PDF document text
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/kidatimujaxi_risudis_fibonakawus.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/Sx7fphg/6055426456.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://dowuxufab.epizy.com/15839958552.pdfIn PDF document text
    • http://davamedanaxosen.rf.gd/sefuwasatafosotuwak.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_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 5296 bytes
SHA-256: ca0b638ff9bb7159de0f7f2009ff8433225e29438743f3dd20e4b3187a8e342b
font_01_sfnt_off0000f4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 10168 bytes
SHA-256: d315afbfcf39acce435c25d06290faf883545f17bf2d7d0cff430177b022eda8
font_02_sfnt_off000117ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117ED 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176