Malicious PDF — malware analysis report

Static analysis result for SHA-256 df749e0aae5c17c5…

MALICIOUS

PDF

75.5 KB Created: 2021-03-01 05:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 67e349a4a874a878c94d974dbeb72eca SHA-1: b6c8936ea70f2c105343ee3ad868e1c5b6f19318 SHA-256: df749e0aae5c17c51e39d5a236271bdc901729a77021053ddd82b9c7dc0c29bd
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://gimoguvi.ru/award?keyword=decision+tree+classifier+in+python PDF link annotation
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/tenenapovos.pdfIn PDF document text
    • https://tonewebebajuja.weebly.com/uploads/1/3/5/3/135319275/warod.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/9JXPji5/vedevetexudugokorofexuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/mamozinuba/Ot1njg9/89544131523.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/wjbhehh/78183168914.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/jbx4idC/formula_1_race_standings_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/lakabarobuk/jhidhcz/3927986630.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/aiejhic/idle_inn_tycoon_double_room.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/iiq2RyD/kalaril.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/dinilederu/chathikkatha_chanthu_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/rujukagoxubaliliba.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/26684429979.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/certificate_of_appreciation_template_free_editable.pdfIn PDF document text
    • http://jopewadakos.epizy.com/daisy_miller_character_description.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/67950512942.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_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 5204 bytes
SHA-256: b4dedb1d7568f0424dec693fded3eaa370d5d6a2304eb37153859d9c5be06046
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 10228 bytes
SHA-256: e84b817a797f2994a48be95e1a11256e3ffaa3f8d6e7a35a6180bb661c514ac6