Malicious PDF — malware analysis report

Static analysis result for SHA-256 17edf545b3ca8209…

MALICIOUS

PDF

69.4 KB Created: 2020-11-09 22:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 515c7a7bdb74da940f5940df8b5d0b8c SHA-1: 96b8da6b22c48b71dd0baa03d8c95883f3afe986 SHA-256: 17edf545b3ca820931831c02d9f8ac082866233d25a40f64b77bc68a83a158df
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic or distribute further payloads. No scripts were extracted, but the PDF structure itself is indicative of a link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffset.ru/aws?keyword=watch+star+wars+revenge+of+the+sith+reddit
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/muloxovumozuzegov.pdf
    • https://nifadajenekipib.weebly.com/uploads/1/3/4/3/134305148/pamasilobiwebikuji.pdf
    • https://xutomanuvafara.weebly.com/uploads/1/3/4/3/134345830/6f3521.pdf
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/vikopajipi.pdf
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/nufogu.pdf
    • https://sedifuwenute.weebly.com/uploads/1/3/4/4/134464273/4853981.pdf
    • https://pofewapat.weebly.com/uploads/1/3/4/0/134018592/d6758540cbcd8d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vifusupegiza/mitumedi.pdf
    • https://s3.amazonaws.com/kudowo/47477605873.pdf
    • https://s3.amazonaws.com/tomamujuf/99992005559.pdf
    • https://s3.amazonaws.com/kosipefojaw/gesebawumelugovavez.pdf
    • https://s3.amazonaws.com/rimejiguvif/31225167831.pdf
    • https://s3.amazonaws.com/xazarujokemus/nesixikufogoro.pdf
    • https://s3.amazonaws.com/simujix/58421351355.pdf
    • https://s3.amazonaws.com/sifawekujiki/foxomowofanikosewizudaja.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc9f.bin
38f589b8d7fb7118a2723e1a1ac8930254f7e904a8118c2135bb8324e1b25686
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9F 5416 bytes
font_01_sfnt_off0000cf22.bin
d4f7dccc1a8e0c628b0f4876ee6b79c98bd8ac7ab2817387f51d991141a119a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF22 10480 bytes
font_02_sfnt_off0000f34b.bin
3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994
pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 16164 bytes