Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1af70cfda71e74…

MALICIOUS

PDF

78.6 KB Created: 2021-03-05 02:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3fbebfe75f2adbf81146b2b0bd0bcbf5 SHA-1: e8b055d691a4d6bf31c16d308025aad5ba19250b SHA-256: fa1af70cfda71e743a10531542b450000ad5cd6150a7a26f01213afb69dbe565
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external links and the overall structure strongly indicate a malicious intent, likely to redirect users to phishing sites or download further malware.

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://pelibifir.ru/wix?keyword=botanist+levelling+guide+ffxiv PDF link annotation
    • https://dusivasawomila.weebly.com/uploads/1/3/4/6/134660852/xutoxigazeparu.pdfIn PDF document text
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/nefinudixew_kisejod_tuxesutip.pdfIn PDF document text
    • https://mabalajobiken.weebly.com/uploads/1/3/4/0/134016714/famubunitugixowu.pdfIn PDF document text
    • http://zotarojeloxin.22web.org/rowiwawaxa.pdfIn PDF document text
    • https://pokumowudo.weebly.com/uploads/1/3/0/7/130740164/gimivejikikojo.pdfIn PDF document text
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/3335187.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/mimor.pdfIn PDF document text
    • https://selemuja.weebly.com/uploads/1/3/4/8/134893326/d51c55c75b975a.pdfIn PDF document text
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/58651.pdfIn PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/f2f361ba759.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/bupaxomu/what_does_check_engine_light_mean_on_bmw_x5.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/34182625744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35118318-2d0f-4a09-9f25-4ab33354bc6a/ncees_reference_handbook.pdfIn PDF document text
    • http://winulesodix.rf.gd/walukivuwesagumejik.pdfIn PDF document text
    • http://jekidosokun.epizy.com/colt_ford_song_answer_to_no_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cafb4732-d418-478a-8741-2277cb24d309/80546086603.pdfIn PDF document text
    • http://pifetipopazemex.rf.gd/exponents_radicals_and_polynomials_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b29f80-c0fc-4912-9811-e18a1a889ae2/rccg_sunday_school_teachers_manual_10th_january_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02064168-1f1a-41c9-a6c4-04f2a72ff9ea/tozugewalowanukakitisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d63ec9-d711-4b26-afc2-bc5dce394fcc/79311168692.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_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 5156 bytes
SHA-256: 08a51dc629452ada3c1804eda838c5a957ddb0ca017538d546931886075fbbf1
font_01_sfnt_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 10380 bytes
SHA-256: 3c0551cd6828fcd2fb82e3cbb8d928a8611752b65f48a7a03c1a0a7a6ec25d08