Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08af81e585cab77…

MALICIOUS

PDF

75.2 KB Created: 2021-02-24 01:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ce2a8e737da4674c8acf632ff71edd48 SHA-1: 410f2ee72d237a0db5bcc9409990f9c83050f3c9 SHA-256: a08af81e585cab77aa172b215e6f138fe1058e67904515ec3d66e121bc0936d6
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://maypoin.ru/wix?keyword=information+technology+worksheets+grade+8 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470521/normal_5fec0af0cf1b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_5fe5e86162e8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fe20505b9c88.pdfIn PDF document text
    • https://maxolesaso.weebly.com/uploads/1/3/0/7/130776327/101006319e5b8.pdfIn PDF document text
    • https://gefedotozowane.weebly.com/uploads/1/3/4/3/134395864/5390633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_602e4f8cdffc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5ff277fecb2c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_5fe2ecf470390.pdfIn PDF document text
    • http://vunusidaf.22web.org/mixokeraguzobi.pdfIn PDF document text
    • http://fasodotujane.iblogger.org/evaluating_piecewise_functions_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/jfYigic/92685207997.pdfIn PDF document text
    • https://xejigidusulup.weebly.com/uploads/1/3/4/7/134730122/laromuxekana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunupilopun.epizy.com/todinirojuruzitij.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/telangana_folk_songs_free_in_telugu.pdfIn PDF document text
    • http://kelawezup.rf.gd/tangled_songs_in_english.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_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 5824 bytes
SHA-256: e96895310295a2924ab6abcc0258522bec5c345529e29c805ff46b9a7d8fbbb9
font_01_sfnt_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 10460 bytes
SHA-256: 688eb9288f02e497d14361435befa4e6a177f08c6a116ce763556f34f449e35e