Malicious PDF — malware analysis report

Static analysis result for SHA-256 450b2993ea68837a…

MALICIOUS

PDF

82.6 KB Created: 2021-01-10 10:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e9fe1fbd1ff320b592bc868bcda58230 SHA-1: 99fcb1bdad417dcf3be55c1bc082f1f5ca08f135 SHA-256: 450b2993ea68837a5d2eedf733048a37e2a3717ddb4734c51b85636509c4adf1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded heuristics reveal numerous links to external websites, many hosted on disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'utm_term=dfa+authentication+form++pdf' in one URL further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=dfa+authentication+form++pdf PDF link annotation
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/45ac27e20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407756/normal_5fc655c135f94.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/ahhZBqK/57115670575.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/jdID2ic/62777270626.pdfIn PDF document text
    • https://site-1166752.mozfiles.com/files/1166752/keloloxad.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/8103798.pdfIn PDF document text
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/8596419.pdfIn PDF document text
    • https://site-1204325.mozfiles.com/files/1204325/hockey_keeper_pak_kopen.pdfIn PDF document text
    • https://site-1168098.mozfiles.com/files/1168098/contractor_in_construction.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/dgcCjou/motorbike_rider_nitro_motorbike_riders.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5f95ae4a90f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5fdb5bc7b0eb4.pdfIn PDF document text
    • https://site-1178084.mozfiles.com/files/1178084/legibuvobejives.pdfIn PDF document text
    • https://site-1172683.mozfiles.com/files/1172683/mini_race_car_legends_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/Sijjggh/sufexajexilafazokidenusuk.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/9076638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f88f9d4d6e48.pdfIn PDF document text
    • http://<DFA-FQDN>/Citrix/Authentication/dfaserver/startIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 11216 bytes
SHA-256: 23680b3dec91e3f9a6cef208d3f0a8f9482dfb3bd946f47c5cb20f9f9cbbd7df
font_01_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 5184 bytes
SHA-256: 2112dcda0242df275b1001819bafdf5d9f1abf38f873ab3b83de408508712789
font_02_sfnt_off0001177c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 11208 bytes
SHA-256: efa87aa6b8d1b24f7d1e3108d4107d4f0ddcb4097a98e79662b89a56d7a375b6

Open this report in the interactive analyzer, or submit your own file for analysis.