Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4913fecc31e697…

MALICIOUS

PDF

76.7 KB Created: 2021-02-25 16:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4013c497070af64e11500e4665185ba4 SHA-1: 8085690ca926139a16ec7d34440979e99e51191e SHA-256: fd4913fecc31e6975756dd526d849a776d34c6cf59cecffcddd58c814cd2f343
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to obscure malicious destinations. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'digital design principles and practices package', likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=digital+design+principles+and+practices+package PDF link annotation
    • http://lanejaselisipu.22web.org/arjun_bijlani_photos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411702/normal_5ff8b3f736b6f.pdfIn PDF document text
    • http://wogigafulokeme.22web.org/6462111580.pdfIn PDF document text
    • https://baxorejo.weebly.com/uploads/1/3/5/2/135295822/gukovudopupal-memogeramariba-kewugepitilomi-megupeworufoba.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/395f364a1845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_601317bcb75dc.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/bd188f41dfa0.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/ce9c93.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/37a313342.pdfIn PDF document text
    • https://ziruxirunilexa.weebly.com/uploads/1/3/0/7/130775543/rimukalutiwa.pdfIn PDF document text
    • https://rurezakofone.weebly.com/uploads/1/3/1/1/131163981/xanozipiruzujupot.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/Y8ibSge/discord_bots_like_mee6.pdfIn PDF document text
    • https://xedijekotaz.weebly.com/uploads/1/3/1/6/131606072/5050826.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/tkZejiD/pamotefilowu.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
    • http://libizokize.rf.gd/dji_naza_lite_to_v2.pdfIn PDF document text
    • http://tobekiginekafo.epizy.com/kunadokilu.pdfIn PDF document text
    • http://zenomidesedi.rf.gd/chinese_characters_google_translate.pdfIn PDF document text
    • http://pikididubemet.epizy.com/google_chrome_manager_resume.pdfIn PDF document text
    • http://kefekebew.rf.gd/how_to_open_locked_indesit_washing_machine_door.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 4984 bytes
SHA-256: 603d094a9a459128dad714414e034070be44ed65a97f63e444357b9c0097da51
font_01_sfnt_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 10472 bytes
SHA-256: 7d0d56e30b04a8686a5e90dba0c49e57ac7138bd73494e25cb43c98a06459521
font_02_sfnt_off00011721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11721 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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