Malicious PDF — malware analysis report

Static analysis result for SHA-256 33aa5345badfcb16…

MALICIOUS

PDF

86.8 KB Created: 2021-04-16 13:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 17a8a4262a08860ccc028dc7290d0356 SHA-1: c1b880a300b2dc53815c6589d69a4be2cc8a4297 SHA-256: 33aa5345badfcb164bdf24cd595fd1387f34a6910a15feff1e3e53be8239cab8
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://lozipotod.ru/strik?utm_term=pioneer+deh-x6700bt+microphone PDF link annotation
    • https://daniveledize.weebly.com/uploads/1/3/4/9/134900130/6044756.pdfIn PDF document text
    • https://xetomulezaze.weebly.com/uploads/1/3/0/9/130969551/mapavem-wozad-bibigutelifokel.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/bumaxixurovapo.pdfIn PDF document text
    • https://pudosibax.weebly.com/uploads/1/3/5/9/135964381/179ecbc3efd1.pdfIn PDF document text
    • https://zotepuzexalebox.weebly.com/uploads/1/3/5/3/135397030/benut.pdfIn PDF document text
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/5171251.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/ghkjaTO/92377856402.pdfIn PDF document text
    • http://newser.site/blasones_y_linajes_de_galiciaypte2.pdfIn PDF document text
    • http://openlait.pro/fodalomikolajularewuropbv9xy.pdfIn PDF document text
    • http://copyright-supporthelp.com/nejuterijalofewamajoeyr2i.pdfIn PDF document text
    • http://salufogi.iblogger.org/allen_and_overy_situational_judgement_test_answers.pdfIn PDF document text
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/9656827.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/bL6hiQU/sibisilofi.pdfIn PDF document text
    • http://uscreditmonitoring.info/ffxiv_the_great_hunt_extreme_chest4jvfy.pdfIn PDF document text
    • http://nesobaka9.xyz/33192261434e2dwy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4eac3cc-9150-4409-b4ce-fdc955bc186c/tinojak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa527e61-7cc1-4e95-9ab3-87d92a948661/britax_marathon_70_g3_car_seat_cover.pdfIn PDF document text
    • http://gazosogedib.epizy.com/38697798779.pdfIn PDF document text
    • http://vubefezit.rf.gd/the_vampire_diaries_season_1_episode_8_full_episode.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 2960 bytes
SHA-256: a4eee3438a7246650f0a21218a9bc29d7bc7bf1b287bce9df301f714692068dd
font_01_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 5512 bytes
SHA-256: d98de110e2d0d9af2f9e5128bb591a94639115937bf79e53c0e42270e58fd7de
font_02_sfnt_off0001118a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118A 10892 bytes
SHA-256: e0157459b0ce739445dc43df2f8477d4aab48f41b7b700b8e49c30aeeaf9516c
font_03_sfnt_off000136fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FB 16332 bytes
SHA-256: 13c7fd6ede0addbb39469815e2537798e7aec9bd92d6ff1ed3ce06a5cf8d053f