Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dad9abed78bc15…

MALICIOUS

PDF

84.6 KB Created: 2021-04-02 12:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92d7666cd19a1c193f406079772b5df3 SHA-1: c9d9c948b7967db9b165cd4fb5e5795a1feb5d39 SHA-256: a6dad9abed78bc154601a8ccd7b4cab65dae0c8d595090714a9e27fa0f424c5b
156 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 heuristic firings reveal a significant number of external links, suggesting a link farm or a method to distribute further malicious content. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, but no clear instructions or lures are discernible. The presence of numerous external URLs, many with unknown reputations, strongly suggests a phishing or content distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/strik?utm_term=shakespeare+sonnet+154+meaning
    • https://cdn.sqhk.co/selodiro/hhgeniQ/vegozamisufewexetipegit.pdf
    • https://cdn.sqhk.co/videbamez/cifhcvL/26045753973.pdf
    • http://vajesafosedepur.mywebcommunity.org/halliday_resnick_walker_11th_edition.pdf
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/newusi_dubena_varofapop.pdf
    • https://static.s123-cdn-static.com/uploads/4487927/normal_5ffa5c5bbb83b.pdf
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/bd03c3ba3.pdf
    • https://cdn.sqhk.co/ligumorik/jdiimji/ultimate_goal_synonym.pdf
    • https://raxitiladiruwek.weebly.com/uploads/1/3/4/4/134487911/5232422.pdf
    • https://cdn.sqhk.co/judawube/fSMif2M/average_gas_prices_per_year_in_united_states.pdf
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/kotirebo.pdf
    • http://lorakuze.sportsontheweb.net/hp_photosmart_c4280_ink_staples.pdf
    • https://cdn-cms.f-static.net/uploads/4493891/normal_604ce718721b2.pdf
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/4568118.pdf
    • http://wivaserana.mywebcommunity.org/58560969857.pdf
    • http://gaximivotekole.mypressonline.com/namowanit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woxojuxafopuv/24945763356.pdf
    • https://s3.amazonaws.com/sefipa/85396354963.pdf
    • http://kawerulim.onlinewebshop.net/computer_application_in_pharmacy_download.pdf
    • https://s3.amazonaws.com/xabalaru/hipaa_confidentiality_agreement_template.pdf
    • https://s3.amazonaws.com/ditiruz/38997425774.pdf
    • https://s3.amazonaws.com/zedilegol/blue_bossa_backing_track_no_bass.pdf
    • https://s3.amazonaws.com/gagotaniwipure/fedex_tracking_phone_number_united_states.pdf
    • https://s3.amazonaws.com/godoremitiwuja/para_que_serve_cloridrato_de_metformina_emagrece.pdf
    • 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_off00010c24.bin
ab9891bc3b0fbbfb5fcfbd1eb9268c1e075fb55289f21ef633280030d9addb18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C24 5632 bytes
font_01_sfnt_off00011f2e.bin
106acae7afe859337854264fe054ac067b6c1f3ca6e0c18aa12ddf2aa7867c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 11176 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.