Malicious PDF — malware analysis report

Static analysis result for SHA-256 244e93188c443e51…

MALICIOUS

PDF

61.3 KB Created: 2020-12-11 00:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1df9ee8dd05d299a314270640ecf15c4 SHA-1: d224ef6f82718911102901022684cee1e89e0460 SHA-256: 244e93188c443e5131fcc3f601a40ed54c1cc890fad6e885425282b4765c0846
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://trafffi.ru/aws?utm_term=cartoon+film+movies', is presented as a lure. ClamAV detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojan payload. The presence of embedded links and the ClamAV detection strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=cartoon+film+movies
    • https://cdn-cms.f-static.net/uploads/4485714/normal_5fbf8b3a42a04.pdf
    • https://kifisiwa.weebly.com/uploads/1/3/4/2/134266158/vitimamudujux_kokujagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/suximawo/couple_photos_wallpapers.pdf
    • https://uploads.strikinglycdn.com/files/1dc61506-4d81-4ee5-95aa-cb32c6657bff/sigmagyr_rvp_30_manual.pdf
    • https://static1.squarespace.com/static/5fc5abf4ec917750a3f83921/t/5fcb7ecb26a2be7f6de524bf/1607171788494/lebaluruxexezugusagewax.pdf
    • https://s3.amazonaws.com/doxifuba/tegobinopemes.pdf
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fcd01a27ae85b53b2951cde/1607270819180/live_streaming_app_for_android.pdf
    • https://uploads.strikinglycdn.com/files/d5ec1755-4cd8-4b87-a6de-3d097da17c52/pikunis.pdf
    • https://s3.amazonaws.com/wifozuxeku/fobuti.pdf
    • https://s3.amazonaws.com/senodiw/angular_form_valuechanges_distinctuntilchanged.pdf
    • https://s3.amazonaws.com/sorogamat/65451057757.pdf
    • https://static1.squarespace.com/static/5fc53a22bd14ff0dd2b8f5f8/t/5fcde501f94b6402b23d2078/1607329026593/magidefa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b562.bin
2a914cd379d70c58f9347a909989547c6c22c67dc4967894ddda4312e7ef6924
pdf-font-stream PDF embedded font (sfnt) at offset 0xB562 4880 bytes
font_01_sfnt_off0000c5e9.bin
e0c73da8b9e3165c87db0859067b47a25a1a9b7b6bba684b5522ada4664afebd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E9 10404 bytes