Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e324935cadf332…

MALICIOUS

PDF

70.7 KB Created: 2021-01-28 00:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6652a10c5a006b7460f0698b3120f17c SHA-1: 9ce147b857550088a04adb0e83f4494549700743 SHA-256: 89e324935cadf33237b89bac47b31577251cc4e186fe2b7e06da22aa126a0525
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding a large number of URLs, many of which are hosted on disposable domains, suggesting an attempt to distribute malicious content or engage in phishing. The document body, though heavily obfuscated, contains keywords related to symptoms and depression, likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=sibo+die+off+symptoms+depression PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fed529cb81ef.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/wadelajekofunemede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_6001da6db3870.pdfIn PDF document text
    • http://table-wait.com/pejadumugubuwlotmn.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/tixurunanimul-lumewiset.pdfIn PDF document text
    • http://hookup158.fun/7_wonders_of_the_world_list_with_images70nq2.pdfIn PDF document text
    • https://tedamitaza.weebly.com/uploads/1/3/0/7/130740371/pupagesixuzike.pdfIn PDF document text
    • https://bomobokoluv.weebly.com/uploads/1/3/1/4/131437025/mawivuzasusu.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/juminazetisakoveb.pdfIn PDF document text
    • https://rabizelen.weebly.com/uploads/1/3/1/4/131453176/9393f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386074/normal_6008fed345900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ritarejameja.epizy.com/53901603888.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/calculate_distance_from_coordinates_android.pdfIn PDF document text
    • http://nufagogofuj.epizy.com/kaththi_full_movie_single_part.pdfIn PDF document text
    • http://goseletew.epizy.com/40102227249.pdfIn PDF document text
    • http://disofebuwugojuj.epizy.com/bms_new_apk.pdfIn PDF document text
    • http://xivegujox.epizy.com/fikuroremexexogaxufazuvab.pdfIn PDF document text
    • http://temekem.epizy.com/aviva_group_term_life_application_form.pdfIn PDF document text
    • http://dimogotewebi.epizy.com/dezinapegewisujuguxun.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_off0000da25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 5292 bytes
SHA-256: d40a26b2f45a66995e0b7760861a6218619804818202e9ba49f005b7b9bf669a
font_01_sfnt_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 9876 bytes
SHA-256: 701778211cb83ae6e9bbfc2c6a79cce2db8494ea3e7b0601d469917065d75889

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