Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2426b2865253c4…

MALICIOUS

PDF

72.0 KB Created: 2021-03-19 23:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e859b938d4bd3dd5b6f3769989cfe7c3 SHA-1: 350e6b679016f4e944db943d4d0fd81cf2f1f53c SHA-256: 1d2426b2865253c49c04fb4fc72364fc61e86f14359a08d42ca7b5cc0f48e2f0
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the PDF's structure strongly suggest it is used to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://ponafet.ru/wix?keyword=jorge+cervantes+pdf+ita PDF link annotation
    • https://xixekelubijaruj.weebly.com/uploads/1/3/5/3/135329585/45b53823d.pdfIn PDF document text
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/suloweridi-dezimag-bonifozogifilo.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/zeporuvugumufagesoj.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/91870891092.pdfIn PDF document text
    • https://barufaworu.weebly.com/uploads/1/3/5/9/135957986/sajuw_sisiras.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/fantastic_beasts_and_where_to_find_them_book_2.pdfIn PDF document text
    • https://jatowuwovusi.weebly.com/uploads/1/3/5/9/135981640/sixofiwupigiteb-zamojoj-zaseju.pdfIn PDF document text
    • https://limifotediko.weebly.com/uploads/1/3/5/3/135325738/dudojuxori.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/fc6dc196-00df-4d71-846c-6e3a48a21960/spoon_river_speedway_rules.pdfIn PDF document text
    • http://bunetexugefu.rf.gd/lodavijepemofagerak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d21bb5b-212c-400e-b2a9-0e7a7a181df8/what_is_the_healthiest_at_taco_bell.pdfIn PDF document text
    • http://deboputali.rf.gd/ensayo_sobre_equidad_de_genero.pdfIn PDF document text
    • http://pusuzuxagog.rf.gd/u_penn_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569d1680-163a-4f59-bf50-7455ea4ad60d/what_is_l.c.m_in_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/72394882277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/141418de-2f82-437f-b1a8-9082598eac8e/how_he_loves_us_letra_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/akuvox_it83_user_manual.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/pizen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d7e697-3478-4f63-801f-1a753d0cb8e7/xajulawunomizazeduzufa.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/rojukidakisig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e919ad-fbfc-43c7-a095-dc995a2072d8/how_much_is_a_2012_camry_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d04035-0a92-46b4-a819-c3349c7fca9e/dream_yuga_on_road_price_in_surat.pdfIn PDF document text
    • http://zugagib.atwebpages.com/bevevemusexuw.pdfIn PDF document text
    • http://supijidexigoba.epizy.com/21768163520.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 5340 bytes
SHA-256: 80a17e590ff950783eb813a7f3b40f8d61054dd033d2f380c3e18c529c48d7f1
font_01_sfnt_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 11608 bytes
SHA-256: f682843be8ec07a58a1294d4dd32b3c01380a28df1ed413c7e481b4f05012a68