Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0f55b7e3845873…

MALICIOUS

PDF

78.7 KB Created: 2021-05-17 19:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a0b6fb90cf3758a52936e980cf32d75e SHA-1: b244b25b1dbfb44bd2a0e61b7992f1402cdfe097 SHA-256: ed0f55b7e3845873d32dd1f80c106c9da7fd4879a07976ada6426044985bad29
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The embedded URLs, such as 'https://jottigo.ru/strik?utm_term=whirlpool+fridge+ice+maker+quit+working', are likely intended to redirect users to malicious content. The document's structure and the presence of numerous external links indicate a phishing or redirection attack.

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://jottigo.ru/strik?utm_term=whirlpool+fridge+ice+maker+quit+working PDF link annotation
    • http://iqecoportal.ru/567340343448irzp.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/kagolodonilalo-rudef.pdfIn PDF document text
    • http://magazinrf.xyz/worasolawubezijofi0x6l1.pdfIn PDF document text
    • http://pokypka.xyz/turigatowipapoweroresox1sw5i.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/ugiIijb/zavob.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/fgcvhdo/the_swingman_topgolf.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/iFQEDjf/31179333344.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/how_to_make_a_smoothie_with_yogurt_and_no_milkk8m05.pdfIn PDF document text
    • http://artrosil.xyz/part_of_speech_exercise_with_answer_keyea811.pdfIn PDF document text
    • http://canonsburglake.org/what_is_american_patriotismkqfl3.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/ckmicBk/85355046619.pdfIn PDF document text
    • http://2020coupons.info/what_skills_are_needed_for_cheerleading7uvro.pdfIn PDF document text
    • https://tovagaru.weebly.com/uploads/1/3/4/5/134587520/d4dde2d9bc.pdfIn PDF document text
    • http://domsale.xyz/how_to_align_liftmaster_garage_door_sensorsbcyd0.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/zjiWjbv/didedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd85100-0fd1-42c0-812a-b89499a99c6a/biwabopapuxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a936ba-1a62-447c-9e3e-5cbf9d070cab/how_to_enter_radio_code_honda_odyssey_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b18ceb9-906f-4625-8a64-c91603db2747/computer_programming_for_beginners_a_step-by-step_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f62ef51-dc6d-4138-82df-15f056b49f76/71818822297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf506fa-333e-42b1-a761-d8a38639ff69/goditexabowotoseve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71259639-37e9-43c9-bcee-ae490206eff8/les_vacances_du_petit_nicolas_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6450edee-f880-41d8-9071-83456a577501/20262601181.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_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 5684 bytes
SHA-256: c581edffd53e739d9781fda4aea48af9ea111344770f934ec1e94876eb59aa18
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 10760 bytes
SHA-256: ea53b2323a0f53bc4c3a81f929247b6bb5bbac858c061b7c3a34edc23e9dcb93