Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0aed025a16cbefd…

MALICIOUS

PDF

93.0 KB Created: 2021-04-21 13:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 18ddf7339c45356a45cf20ec73126e63 SHA-1: 9a2fb82f73c954f9dd7e2cba22d4f1bf1aa68777 SHA-256: d0aed025a16cbefd8b470cd7821818a18911d1d8699cf0de7682b3e67d2de9af
186 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. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. One of the primary external links is to 'gimoguvi.ru', which is likely part of a phishing or malicious redirection scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=how+to+email+chick+fil+a+corporate PDF link annotation
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/7550885.pdfIn PDF document text
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/556654.pdfIn PDF document text
    • https://vokedovewugom.weebly.com/uploads/1/3/5/3/135349322/5622891.pdfIn PDF document text
    • http://vobalemujumojak.mywebcommunity.org/how_do_i_program_my_magnavox_remote_to_my_lg_tv.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/what_to_do_if_your_amazon_fire_stick_wont_turn_on.pdfIn PDF document text
    • https://kutufesivom.weebly.com/uploads/1/3/4/6/134632784/sikaf_sugijogo_retakif_wopak.pdfIn PDF document text
    • https://sazunanul.weebly.com/uploads/1/3/4/4/134488017/rofomiwupifav-zubud.pdfIn PDF document text
    • https://mofizuzu.weebly.com/uploads/1/3/4/3/134316779/eec4e.pdfIn PDF document text
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/cb0b1815.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/wefakogajaxinu-zejasiwudab-juzubapupud-sezotut.pdfIn PDF document text
    • https://muwemobivom.weebly.com/uploads/1/3/0/7/130776082/wevevasimutu-baxuwotuwilab.pdfIn PDF document text
    • https://tuverasoxodos.weebly.com/uploads/1/3/4/7/134745130/xidemelojoxegatem.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/sanawuxuritevetodobana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/how_to_eat_fried_worms_full_movie.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_a266bd67109a4815998561125b163c54.pdf?index=trueIn PDF document text
    • http://zubiluwetij.myartsonline.com/dotesivenitebofewe.pdfIn PDF document text
    • http://totefopige.atwebpages.com/business_model_book.pdfIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_b2a22f20c8a948f1abce0df821235d3e.pdf?index=trueIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_8f31921e27fd47e4b5d6e2402edf16e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/haltom_city_police_reports.pdfIn PDF document text
    • https://b7d3a0ae-8059-487b-8826-088776693174.filesusr.com/ugd/8d23e4_c120465b5a694bba85144c2d165a24e4.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_off00012ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE7 5196 bytes
SHA-256: e0ba1ec8c19b2fa0b0d20c9098ef80da187bd37db244927e85222d90d834c458
font_01_sfnt_off00013c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C74 11796 bytes
SHA-256: 88020902612237d89de3631633d293904ddc6ce2a312b3c182dd9d923e806ed5