Malicious PDF — malware analysis report

Static analysis result for SHA-256 810889f401b03007…

MALICIOUS

PDF

70.2 KB Created: 2021-02-13 17:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3dee6069b05f95f908b7e9b31a95b9d0 SHA-1: dd1139c93a02bc7260eaee56c210c1a44bd338d4 SHA-256: 810889f401b0300753667d4e222897df140fab3741ec3d314f49125bbc1e648b
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=ap+biology+lab+manual+for+students+2001+pdf PDF link annotation
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/vamedobepenig.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/ogiUojg/gikozegoresujijove.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/cic2zvK/88581825419.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/2CPhhjj/underseat_storage_toyota_tundra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5fef0e4e1f0f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_5fd690129a2f7.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/hogs_back_brewery_tour_guide.pdfIn PDF document text
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/kerijaluliwom-vematixolokenu.pdfIn PDF document text
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/lojafox.pdfIn PDF document text
    • http://tamakar.tech/sabre_dance_piano_sheet_music2l6hr.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/datarofapakil/wanamewidaripox.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/miduz.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/pronunciation_of_budesonide_formoterol.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/gafupinalar.pdfIn PDF document text
    • http://suwuxuk.epizy.com/87490705253.pdfIn PDF document text
    • http://zalinejogimi.rf.gd/3rd_law_of_thermodynamics.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/chaldea_uniform_fgo.pdfIn PDF document text
    • http://tofarogupa.rf.gd/att_uverse_average_speed.pdfIn PDF document text
    • http://zusewijoje.epizy.com/free_business_card_templates_for_catering.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_off0000d364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 5920 bytes
SHA-256: e722bbfae00a424a5537229b9baadd985518d6479ddb553659d49e356270f372
font_01_sfnt_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 10640 bytes
SHA-256: 698c25fc04bffa9fcb186458278bf950afe2803a640af09c46f0bd550817e032