Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1b443fdfe2716a…

MALICIOUS

PDF

81.9 KB Created: 2021-04-09 00:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 540fc51baab39bd5634c8b75fdb1eddc SHA-1: 47e312035dcfa992fa6316b2d39b15af39dd1d0d SHA-256: fd1b443fdfe2716ac6dff440fc492a9cced21b0a7a31e0a6d97bc4145cd17ddf
186 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 document body, though heavily obfuscated, appears to be a lure related to a phone manual, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=inter-tel+8500+phone+manual PDF link annotation
    • https://lanulizuxuja.weebly.com/uploads/1/3/4/6/134658029/lebagozepirifod.pdfIn PDF document text
    • https://motadonikedubi.weebly.com/uploads/1/3/1/8/131856170/nojov-nekoliganu-zaputafa.pdfIn PDF document text
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/bexinelezakepadir.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/ENjdZM3/color_detection_rgb.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/hfTjdie/sakeguxivadovamozefap.pdfIn PDF document text
    • https://nolobatunu.weebly.com/uploads/1/3/0/7/130740420/e5c922.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/hf0tKjb/picshot_photo_editor_pic_collage_maker_filters_download.pdfIn PDF document text
    • https://nafuginanosuja.weebly.com/uploads/1/3/4/5/134598664/nizuxiv-pekaferufikufil-kovekokejuno.pdfIn PDF document text
    • https://cdn.sqhk.co/sunaxidida/zmhfoPO/city_racing_lite_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/fjfDEhd/45516168159.pdfIn PDF document text
    • https://goneludolazoga.weebly.com/uploads/1/3/4/4/134488647/2606294.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/36a66f4.pdfIn PDF document text
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/zipusikuga_rumanapezoji_ruwiw.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/gCDyeif/44261361758.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/3949323.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5020bf63-cca6-4502-b356-752d4dbdaafc/19240229502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d43b891-28bb-4b5a-96ee-d917a85531e1/free_download_english_grammar_correction_software.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_off00010140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10140 5312 bytes
SHA-256: 13ec690fe9d2b8ebe76b7d1a91abb0f25e58a4824f4a91628aa072429e2942ab
font_01_sfnt_off0001132d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132D 11172 bytes
SHA-256: da4a98ad3aa4e94bca932f26d815060550b182fa7df41726d47814fc0c440adc

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