Malicious PDF — malware analysis report

Static analysis result for SHA-256 232b79af268ca68f…

MALICIOUS

PDF

78.3 KB Created: 2020-12-28 07:37:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d9f962f2e2812e4961f430c172d9525 SHA-1: 101750e097ae326a1d673d10367b87b1be738ec3 SHA-256: 232b79af268ca68fd2c542697bba849cd46c73e21286f5f380825b1eef336abc
156 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, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary URLs, 'https://traffking.ru/strik?utm_term=ike%2527+s+love+and+sandwiches+san+diego', is directly associated with the PDF_URI firing. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or malicious content delivery intent. No scripts were extracted, but the sheer volume of links points to a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=ike%2527+s+love+and+sandwiches+san+diego
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/3578150.pdf
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5fd814d35b00f.pdf
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5fb439a231ea2.pdf
    • https://gekalizafazidej.weebly.com/uploads/1/3/4/6/134699032/6879470.pdf
    • https://cdn-cms.f-static.net/uploads/4453117/normal_5fb52058a4620.pdf
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/regamafizesoxidiwed.pdf
    • https://cdn-cms.f-static.net/uploads/4482402/normal_5fe96347c6faf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/firigugixujotov/dharam_adhikari_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/5e7bb932-326c-4841-9b7c-52c6885c1475/1800415062.pdf
    • https://s3.amazonaws.com/mokamoba/kujog.pdf
    • https://s3.amazonaws.com/zuses/stargate_sg1_rpg.pdf
    • https://uploads.strikinglycdn.com/files/e69c32f9-4fba-493e-ac92-b0c9bf64a250/animal_crossing_shampoodle_wild_world.pdf
    • https://s3.amazonaws.com/rodigapigeta/cheat_engine_6._4_android.pdf
    • https://uploads.strikinglycdn.com/files/cc66b6ee-f749-4621-a10a-02930b866f9c/muputiwutegowijupiruxin.pdf
    • https://s3.amazonaws.com/kovilowab/78879878799.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_off0000f1f8.bin
431d997dac2af92cbc478f479d3f48dbab0b87ff5d6d70243d3724292ec640b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 5292 bytes
font_01_sfnt_off00010419.bin
f02f39a97225b8fb7f457e8d6ed83c21449a52571f60cb6715e377335f082136
pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 11760 bytes