Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e36c787f3a8256a…

MALICIOUS

PDF

75.9 KB Created: 2021-03-15 22:21:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 840729adddff22ba9dc883965bbaa885 SHA-1: 28854f857503dd24e65aa4b9ffc6be5ba5f4f12f SHA-256: 9e36c787f3a8256a4ae3d9b1f61c544e85e742faa27796f48008a02edf1e6b13
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to a link farm designed for SEO manipulation. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically flags an image lure leading to an SEO redirector. The primary malicious URL identified is https://baarspo.ru/wix?keyword=thaumaturge+hunting+guide, which is likely used to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the heuristics and the presence of external links suggest an attempt to exploit users through deceptive content, aligning with phishing or malware distribution tactics.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=thaumaturge+hunting+guide PDF link annotation
    • https://kesizibewasi.weebly.com/uploads/1/3/0/8/130813921/5276269.pdfIn PDF document text
    • https://boxijapemisavar.weebly.com/uploads/1/3/0/8/130874030/1350461.pdfIn PDF document text
    • https://zarixurumis.weebly.com/uploads/1/3/1/4/131406049/nojefafunurugage.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/2633917.pdfIn PDF document text
    • https://luluroruzole.weebly.com/uploads/1/3/0/9/130969682/jisakuzotulibo.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/desuzudub.pdfIn PDF document text
    • http://gopexilif.22web.org/86144771618.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/pofinekinapemel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutagisite.epizy.com/handel_arrival_of_the_queen_of_sheba.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/nursing_interviews_questions_and_answers_for_university.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/73970862859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee7ddc9-7db0-4a07-b3cb-f2da605bdc1d/lux_tx500e_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/buzididamesorum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8c9e24-ffd5-4666-ace7-c113ca45d2a7/lifetime_44_portable_basketball_hoop_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/5848185119.pdfIn PDF document text
    • http://davivozerab.rf.gd/14800147648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d287b79-343d-4e0b-b65e-808241ab078f/car_detailing_price_list_template.pdfIn PDF document text
    • http://vapuzinejag.rf.gd/diffusion_of_innovation_theory_rogers_1983.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/28588901405.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/my_asus_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/60951852882.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/lowrance_mark_4_hdi_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/vanilla_twilight_instrumental.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/blackmart_alpha_old_apk.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_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 4980 bytes
SHA-256: 568dfd8e1064e520d02826b911f21f1d133d9ae52306be4b7ed7222d1dd32b23
font_01_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 10508 bytes
SHA-256: aee3f659caa929fdc1d87bc8155aa166cd43ecd3ea4d7dda56c4b96edd1219e7