Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafec1aceb83971f…

MALICIOUS

PDF

70.2 KB Created: 2020-11-19 15:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68b23a2f16586bb6867f452de9977fb6 SHA-1: 17ddfa03c9c3cccda96e5b3fd920a1670acee28a SHA-256: aafec1aceb83971f0aa33c0e123db2b3ba18534512f530b9a80301772ca802ee
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'traffset.ru', suggesting a link farm or redirection to a malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further indicate malicious intent. The embedded URLs and the nature of the heuristics strongly suggest this document is designed to lead the user to a compromised or malicious resource, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=how+to+highlight+duplicates+in+google+sheets+multiple+columns
    • https://lesorini.weebly.com/uploads/1/3/4/3/134376350/livividuf_tejesa.pdf
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/6ad4fe5dfbb9009.pdf
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/bapavesezibuwe.pdf
    • https://gakexuguzadeza.weebly.com/uploads/1/3/4/4/134401700/loxebo.pdf
    • https://zilowefid.weebly.com/uploads/1/3/4/5/134510497/31531f87274.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/850e34c1-c8da-4c81-af76-bf55948579ea/please_confirm_your_age_to_save_this_change.pdf
    • https://uploads.strikinglycdn.com/files/cb92c998-3068-4798-8268-57ffbdba2571/3771230832.pdf
    • https://uploads.strikinglycdn.com/files/cd416c6f-aadd-46aa-b5bd-a0a357ce6d40/farmers_lab_seeds_account.pdf
    • https://s3.amazonaws.com/vavabi/gigosa.pdf
    • https://s3.amazonaws.com/xesigeze/csub_spring_2020_final_schedule.pdf
    • https://s3.amazonaws.com/nigimul/46959686870.pdf
    • https://s3.amazonaws.com/mupukesunobaga/bass_pro_shop_catalog_request.pdf
    • https://s3.amazonaws.com/podawakumepewez/lojisolof.pdf
    • https://s3.amazonaws.com/betefowubevat/sexilevowewulazixowujalod.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_off0000d467.bin
b598116c72c744c98be8b2a2d6409daab1d72dd4e0c95561e38716c17741bf9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 5444 bytes
font_01_sfnt_off0000e6de.bin
a9b4ba334388dcbedb3c516fe152509af3c05b3bbf829caad1742734373b2963
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 10780 bytes