Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2234519b18154c…

MALICIOUS

PDF

97.2 KB Created: 2021-04-06 03:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0fabc67d487bf06f8d991b9627e974f2 SHA-1: 46a4e65cc270aea2de8a4ed3fe075d379d39f1db SHA-256: ac2234519b18154c264b6f4913701cefad9b7230b7f786ffba11e6b076087278
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with many pointing to disposable hosting and exhibiting characteristics of a link farm. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The embedded URLs suggest a phishing or malware distribution scheme, likely leveraging the document's content as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=beauty+and+the+beast+soundtrack+1991 PDF link annotation
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/kozodularo_tekovonivadobi_xogagujatot_zejegudogodejap.pdfIn PDF document text
    • http://diwolekeku.22web.org/spoken_english_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475380/normal_5fcbfe17ee7a2.pdfIn PDF document text
    • http://reduslim-shop.site/livelo3zbvp.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/43815736442.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/infeco_intestinal_bacteriana.pdfIn PDF document text
    • http://axecheat6.xyz/the_beautiful_and_damned_song_lyrics4ugux.pdfIn PDF document text
    • http://in-arenas.com/barrons_gre_book_22nd_editionqzgs2.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/xosikofizi.pdfIn PDF document text
    • http://philonio.online/how_do_you_make_biodiesel_from_waste_cooking_oilvcx97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_6044a54753cf8.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/marriage_proposal_letter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_5ff59b57db00c.pdfIn PDF document text
    • https://zuwizogagotajal.weebly.com/uploads/1/3/4/0/134012426/69524e67f71d3.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/jukezeluf/fivis.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/dungeons_and_dragons_adventure_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/zupijupobupiguvolanemuj.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/75058236482.pdfIn PDF document text
    • http://ziketikivanodiw.epizy.com/international_cricket_ranking_all_format.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_off0001201b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201B 8112 bytes
SHA-256: 58b6fe8b0ca97489a072910e7d2cb926fa4a9b6e362012e3b9e6c002924f7a8c
font_01_sfnt_off00013b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B98 5556 bytes
SHA-256: b74cdbde0722e924a91dec33b22a8f50293dd3bbb17ad33ad37fd488c6836b60
font_02_sfnt_off00014e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E78 12740 bytes
SHA-256: 3938f640e17065869fd061f129b1f2c35cb39dceee17e4c57ec1816397d8fc67

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