Malicious PDF — malware analysis report

Static analysis result for SHA-256 5612a98d8640436c…

MALICIOUS

PDF

72.9 KB Created: 2021-03-29 10:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 36049e2ade6e3592d24a5cd3ccb61e13 SHA-1: 490d688ac00cdc9c246b8b2a77fdd855969c6b1a SHA-256: 5612a98d8640436c3632ff58c7ad45911029e0d71ea8cd1a98fa6b4d93aa6dee
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF's structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=minn+kota+mk-ec-15+battery+charger+output+extension+cable PDF link annotation
    • https://wadodimimilupe.weebly.com/uploads/1/3/0/8/130873890/3591921.pdfIn PDF document text
    • https://sitimewodojex.weebly.com/uploads/1/3/1/8/131856527/xofudowuzova.pdfIn PDF document text
    • http://reznitskygallery.com/what_are_the_five_major_categories_of_antibiotics8ytd1.pdfIn PDF document text
    • http://nanutoz.22web.org/solinopom.pdfIn PDF document text
    • https://sebinegovana.weebly.com/uploads/1/3/4/0/134095930/wewavexamirerasoje.pdfIn PDF document text
    • https://monubigikupo.weebly.com/uploads/1/3/4/4/134493781/puvokebunot.pdfIn PDF document text
    • http://ita-women.space/26044353091g4d29.pdfIn PDF document text
    • http://physcoo.com/what_are_the_three_wishes_in_the_monkeys_paw7lp1k.pdfIn PDF document text
    • http://fiwojinafo.22web.org/vuretepasotixitarubez.pdfIn PDF document text
    • https://wakavofidokevi.weebly.com/uploads/1/3/2/6/132681750/4b7a563.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/55867816829.pdfIn PDF document text
    • http://callipakk2.site/distance_vs_time_graph_worksheet_answersct5sa.pdfIn PDF document text
    • http://test123test.xyz/download_apk_smooth_action_cam_slow_mo_proh4hps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_3e6711d711764f369bd2fbba63047e90.pdf?index=trueIn PDF document text
    • http://lavoxema.onlinewebshop.net/android_app_to_convert_webpage_to.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/advanced_trauma_life_support_9th_edition_free_download.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_f68cc55ceccb4332a3bc5700375098ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/93467628612.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_b55e536e68c345d4a1de36621311d291.pdf?index=trueIn PDF document text
    • http://rifesos.epizy.com/kaxixowojakopeg.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/scag_tiger_cat_2_bagger_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/bhaktha_kumbara_full_movie.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_bc5091d73adf473c82e3b0738e6af8a8.pdf?index=trueIn 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_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 5936 bytes
SHA-256: b35f449ce94e90504a92f5a786811bb1ac7cc67c120a95c307a033d4d398726c
font_01_sfnt_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 11140 bytes
SHA-256: 06332761c9eba2460b2f3834cb93ab9294188335b812f7bea17845412e3897a7

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