Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c47abb690731357…

MALICIOUS

PDF

82.3 KB Created: 2021-05-11 11:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5848222b567b801c9c5a8b72982a780 SHA-1: 9f8ee8348645b05294d95814705475a976195303 SHA-256: 3c47abb690731357725d7a36bec8808e7fcb98e9500ea391114cb43c4ba82c35
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to domains that appear to be part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=how+fast+does+a+250cc+quad+go
    • http://remoliwagofaju.mywebcommunity.org/astronomy_today_8th_edition_free_download.pdf
    • http://nevugol.iblogger.org/56700715563.pdf
    • http://roburupagosode.iblogger.org/61088974858.pdf
    • http://tivuximuliku.mygamesonline.org/75041117769.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zilinovupiketom.epizy.com/how_to_replace_singer_sewing_machine_belt.pdf
    • https://uploads.strikinglycdn.com/files/5f049c35-b3c1-42f3-b683-5d92875c797c/mesakogemezujema.pdf
    • https://uploads.strikinglycdn.com/files/e04a2e5f-8558-4b1e-a842-a66874fc1751/wosibufoj.pdf
    • https://uploads.strikinglycdn.com/files/89ea4b41-6d0e-49c7-9c7b-1970d59bac8d/casio_g-shock_sports_model_ga110-1aos.pdf
    • http://xasejumav.onlinewebshop.net/ccna_1_chapter_1.pdf
    • https://uploads.strikinglycdn.com/files/df0d52eb-66d0-4cba-b31c-91a1efdbd3bc/nositofigi.pdf
    • http://namavorudil.epizy.com/91466892232.pdf
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_5d53ebf7b8d348d697c6bd1dab9e201e.pdf?index=true
    • http://vefogurokupug.epizy.com/rasefizexesuxepifuvanu.pdf
    • https://uploads.strikinglycdn.com/files/89b74a41-7cbb-4ed4-93fb-77ff52c92e2b/california_apartment_association_rental_agreement_month_to_month.pdf
    • https://uploads.strikinglycdn.com/files/034c1368-36f4-47e8-ba19-ca2effaf753f/how_to_set_up_voicemail_on_toshiba_digital_business_phone.pdf
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_e57cd4d5c3e345bf98ad97f03a50f125.pdf?index=true
    • http://fazegujopazoj.atwebpages.com/danoman.pdf
    • https://uploads.strikinglycdn.com/files/cbe70eb7-06ee-4edb-9b35-25e67a730aa9/48555768186.pdf
    • https://uploads.strikinglycdn.com/files/5a251dd2-15d0-473d-a487-51f5d5a21c2b/how_to_find_out_tv_code_for_sky_remote.pdf
    • https://uploads.strikinglycdn.com/files/fda51cfb-76f4-42c3-a3cb-93ac00e8d92c/53294160898.pdf
    • https://uploads.strikinglycdn.com/files/031fc5de-c075-4761-9473-c5366e25faa0/majiwuvinebafiwejelar.pdf
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_7b38177939d74e4bb03840154292eb48.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102de.bin
e5fbd2a4f785bf62902c7f6e0fb1b676219f8ac061c1814cd09516903d690fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 5636 bytes
font_01_sfnt_off00011639.bin
f850752cd8c519cc8f1f1604ab946c5bb55c2ac1c003a5ce4352c2d7ef03bb16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 10544 bytes

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