Malicious PDF — malware analysis report

Static analysis result for SHA-256 0062f9bae7c977cc…

MALICIOUS

PDF

75.0 KB Created: 2021-02-21 04:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 632e4a2f42b16da4d00fed75ea06aea3 SHA-1: 11c5a230393d91e99535cc5a43501add98cca554 SHA-256: 0062f9bae7c977cc75e59adc9e938bb3e565df34c8f6f3c8c15dbd36a6854ce9
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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
  • 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://jottigo.ru/123?utm_term=iatf+16949+documents+pdf PDF link annotation
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/fiwumojasivalipazopo.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/Lgd3Vgi/highwayman_poem_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/4RLigks/4312015898.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/kjdTihg/labyrinthine_artery_stroke.pdfIn PDF document text
    • http://giocodigital.website/packing_list_shippingp50r4.pdfIn PDF document text
    • https://jotowaviroretog.weebly.com/uploads/1/3/4/6/134604658/zegodepexuba_nibapurore_dojigonilux_puduzuwabimudu.pdfIn PDF document text
    • http://fapseo.ru/49850793343w6q4o.pdfIn PDF document text
    • http://vorecan.fun/68534888423dfe6n.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/Uhdhj5t/nudirenavivomegaza.pdfIn PDF document text
    • http://iblack.space/chrome_extension_download_flash_gamesai8s0.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/cKQxyCn/34862491438.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/eCogcii/22737959940.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/cwi2icp/sing_play_karaoke_your_mp3_app_download.pdfIn PDF document text
    • http://ostanni.fun/51691632117xgv36.pdfIn PDF document text
    • http://autobaff.xyz/performance_appraisal_answers_examples27yvp.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/levumoduf/najuzopezufowenumetuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/93858735580.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/86762263682.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 5560 bytes
SHA-256: 41531620826c3f32880a1a430e2c2d99a260341e096e9602dfad1e54da460987
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 10316 bytes
SHA-256: 7a12e9dd4d4ae69c809d70f82d3b9bbd269d48bdec7139dc6d75f20d93f7b81b

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