Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf2f72f614bd6b5…

MALICIOUS

PDF

79.0 KB Created: 2021-03-29 16:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e905d221f3d27e715fd002b3cfb73762 SHA-1: e94c44b78f1496118d24acba9a72956749950449 SHA-256: ecf2f72f614bd6b550afe0119c4b4eea5ccb3b00a30a8cd2dc298d8429ee67f7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site for credential harvesting or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+write+a+grant+proposal+pdf PDF link annotation
    • https://fojugifobuko.weebly.com/uploads/1/3/5/3/135328464/mijegiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/lhhaLE4/no_sew_metal_jean_buttons.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_5fd932925b4fc.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/heOgyfC/77670669546.pdfIn PDF document text
    • https://logifuvixejexa.weebly.com/uploads/1/3/6/0/136019385/tuzajajekuvipomaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_6027270d23992.pdfIn PDF document text
    • https://kutobuxuvesoga.weebly.com/uploads/1/3/0/7/130740510/wirerotajalimo_kufugetedul_xixuroduwus.pdfIn PDF document text
    • https://cdn.sqhk.co/zusegekum/jbXSOji/free_homeschooling_resources_uk_ks2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5fd8be9219169.pdfIn PDF document text
    • https://kuwoloxafi.weebly.com/uploads/1/3/0/8/130873903/rekotakufavixem_numap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374839/normal_5fcf4f0519f0c.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/pEKjbnE/3422864938.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/iiShfhi/bowling_king_cheats_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_603fadc585680.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/kozibowisenatu/1672172730.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/toy_blast_free_games.pdfIn PDF document text
    • http://wobowix.rf.gd/37436436822.pdfIn PDF document text
    • http://gupepitasaxisal.epizy.com/purchasing_and_supply_chain_management_books.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/how_do_you_clean_and_oil_a_grandfather_clock.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/stock_investing_for_dummies_5th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/32338482541.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/behringer_xr12_app_for_pc.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_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 5260 bytes
SHA-256: 79c5e8ab7e266a7fde9f69a1adc34eabfd865b008c4c2bbec2ad260306bd7aba
font_01_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 10500 bytes
SHA-256: 057d618f3a7a7b64e8dda5b86b3f024d9668690d7c07a04bc042d4d6a8af5dad

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