Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f022afc378eedcd…

MALICIOUS

PDF

80.6 KB Created: 2021-01-25 02:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f9afd919e566df1151cfc3ff81898ff6 SHA-1: 76ddd63979092e586cd6b2fbacc5cca78852828d SHA-256: 1f022afc378eedcd888ad5d8a89e6a88707adce7819a766228f9cfc5d1651df9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL suggesting a lure for 'Belkin wemo switch manual' searches, likely to redirect users to malicious sites. The presence of external URIs and link farm characteristics further supports a malicious intent to distribute or phish.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://trafffi.ru/123?utm_term=belkin+wemo+switch+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5fff93ef04978.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/Sjujeia/landscape_coloring_book_color_by_number_apk.pdfIn PDF document text
    • http://ebay-coupon.ru/arena_football_league_2020dm0cq.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/QQgfhiw/defuwefogisomakajogage.pdfIn PDF document text
    • https://cdn.sqhk.co/vexakebano/c5I2YK9/safopuvobuj.pdfIn PDF document text
    • http://lerawutevokaj.iblogger.org/gambar_animasi_bergerak_lucu_untuk_powerpoint.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/gcgeFgj/kuwazivojibusod.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/jeewehg/4436378556.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/adobe_flash_player_apk_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/2MBavjb/fetuvaroxutejujerataxavev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378406/normal_5fd0511217c03.pdfIn PDF document text
    • http://wapajojakazewi.iblogger.org/60250704184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovututuxopi.epizy.com/abcd_movie_video.pdfIn PDF document text
    • http://gureragiwoxoseg.epizy.com/moviesda_telugu_movies.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_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 5148 bytes
SHA-256: 3d43e1573f5f18039ad3927bf3d7f9be3771414b68c100ac8ca7d0466ab5905c
font_01_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 12208 bytes
SHA-256: a99ec90318e9754a2eda34585fbb150271991d9a59b42e494fe4736595e6548a

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