Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac69ff4ccc0723c1…

MALICIOUS

PDF

40.0 KB Created: 2020-03-31 01:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1e7d739a1ddf4db897dc4b2aec498bec SHA-1: c6760d5ddc091700a49a40233205e42da79d3583 SHA-256: ac69ff4ccc0723c1834a94c3ba95e09895179b725af9e8e118fbf812dc4d1aa3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure and numerous external links point to a delivery mechanism designed to lead users to compromised or malicious web content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 http://xciteeducation.com/uploads/1/3/0/7/130776692/130776692.html#definicion+de+derecho+objetivo+pdf
    • http://firstfuelsenergy.com/uploads/1/3/0/6/130604767/1242409.pdf
    • http://hirechase.com/uploads/1/3/0/7/130739449/7914063.pdf
    • http://moorhencove.com.au/uploads/1/3/0/7/130775293/dumesutebuginarojata.pdf
    • http://calbees.org/uploads/1/3/0/6/130620521/mimetepaxevixekijaja.pdf
    • http://bestplacesinohio.com/uploads/1/3/0/5/130590123/rasebise_kopidizak.pdf
    • http://journeyhealthwellness.com/uploads/1/3/0/7/130738918/raraxireluz.pdf
    • http://seniorcomps.com/uploads/1/3/0/4/130483519/pilinejufatebej.pdf
    • http://matryoshkatactical.com/uploads/1/3/0/9/130969604/755a2b21d6.pdf
    • http://straightawayfreightllc.net/uploads/1/3/0/9/130970016/lijovekaxezuzefa.pdf
    • http://eblanchard.net/uploads/1/3/0/2/130271187/ee542ae170d.pdf
    • http://science2u.com/uploads/1/3/0/5/130588806/potezudaruj.pdf
    • http://soulintegration.com.au/uploads/1/3/1/4/131452950/tuxekaju.pdf
    • http://eneduerabe.org/uploads/1/3/0/3/130323236/bc2f10723f64c.pdf
    • http://scstrainingofohio.com/uploads/1/3/0/6/130603676/7882003.pdf
    • http://crescentlearningcentermke.com/uploads/1/3/1/1/131164448/xujelerupefax.pdf
    • http://sandpiperonsmithslake.com/uploads/1/3/0/4/130490928/3520009.pdf
    • http://goldendoodlesofalaska.com/uploads/1/3/0/7/130776745/dulisuvifexe.pdf
    • http://fakeclothingwebsite.com/uploads/1/3/0/8/130874409/sojedoboborusorov.pdf
    • http://inovarservicosintegrados.com/uploads/1/3/0/2/130288316/4858611.pdf
    • http://lanosaints.com/uploads/1/3/0/8/130814584/birowedeg-janivele-laguvat-kiruvalovutowot.pdf
    • http://gweministries.com/uploads/1/3/0/4/130435955/6254971.pdf
    • http://ultimateworldbyjoshvlessing.com/uploads/1/3/0/4/130483253/povorelovujalik_mesajigafax.pdf
    • http://maconmofccla.com/uploads/1/3/0/4/130483270/cf0f264a9.pdf
    • http://utahfilmcomposer.com/uploads/1/3/0/6/130604863/kovik.pdf
    • http://utahfilmcomposer.com
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007714.bin
90158f5266069f75044e72307951a69b804312bfd39c6b056913cd97f4ef6a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 7460 bytes

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