Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc4871d0462eeab…

MALICIOUS

PDF

84.8 KB Created: 2021-05-09 16:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 68c7474c54a4cb8323399837bd22ffb2 SHA-1: b4374a3d69885457762c462a151fddd0bfc82c70 SHA-256: ccc4871d0462eeab7b06a5c2fc473b5140a800c7d97e1fab38c2df6c8aa02155
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm on disposable hosting. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as 'https://crophysi.ru/strik?utm_term=oster+regency+kitchen+center+mixing+bowls', likely serve as lures for phishing or to direct users to malicious content. The sheer volume of links and the use of disposable domains suggest an attempt to distribute malware or engage in scams.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=oster+regency+kitchen+center+mixing+bowls In PDF document text
    • https://cdn.sqhk.co/jesisuvov/cgdgehd/49055232638.pdfIn PDF document text
    • https://bonavipopugob.weebly.com/uploads/1/3/2/3/132302892/tevibatuw.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/i7TDMJ8/68738683721.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/bl7Zgd7/49930294724.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/xjehnih/electronic_components_sourcing_database.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/NlgdnsN/fuxupenogolapenofovone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_600b11121b514.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/153df62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417659/normal_60008dc26b22f.pdfIn PDF document text
    • https://javumegibevi.weebly.com/uploads/1/3/4/6/134634398/nasetajofebiwonok.pdfIn PDF document text
    • https://fevobubutexub.weebly.com/uploads/1/3/4/4/134481878/96598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_606ceff4c4ea3.pdfIn PDF document text
    • https://vukuwapebu.weebly.com/uploads/1/3/5/3/135310377/tunawu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394072/normal_5fde77aa8e6f4.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/jogh6jb/8_ball_pool_online_hack_coins_and_cash.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/gmjdshe/nixezadifexaxelepado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wujanozo/art_of_the_start_pitch_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/raruxewexopedebapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15b578c-bfc9-427b-8be5-10e15571cfc6/worojanuwagiwejetiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0307d981-b102-4c95-918d-9b4917075160/kusokefon.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/56040180071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca87397-f768-43a8-ba75-893fad649cfc/vapojoboxuwolasipele.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 5284 bytes
SHA-256: 7ff18aca30c3fec86eb06160181fc19ef6a09421ea084ebf1771696a6c21a71d
font_01_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 11144 bytes
SHA-256: 529c8c0ce773f13660c3c096d687b1a65209f913a36d65594ce78575bc00fbd7
font_02_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61
font_03_sfnt_off00013711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13711 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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