Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bbc14e3c2f8e41…

MALICIOUS

PDF

79.8 KB Created: 2021-03-18 14:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e64be4bc6cb1075eddd7286b76c3f704 SHA-1: 42d4d937c6cad04147b9f82e5ab2974f85d1d22e SHA-256: e0bbc14e3c2f8e414824f7edeb1804a38cf156b17b6a7982ea8a7f9bbb6d44fa
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/aws?utm_term=netherland+dwarf+color+varieties In PDF document text
    • http://dotenipago.medianewsonline.com/84384451925.pdfIn PDF document text
    • https://tewamuwomipatus.weebly.com/uploads/1/3/0/9/130969874/delopibupaxexikit.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/download_visual_basic_for_applications_7.1.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/53743724850.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/xasofuguwe-piwuxoxuzib-tudesor-rebagepajow.pdfIn PDF document text
    • https://mosevulex.weebly.com/uploads/1/3/4/8/134860143/5550830.pdfIn PDF document text
    • https://pevufebulole.weebly.com/uploads/1/3/4/3/134351465/35198.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/2843219.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/8516601552.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/lego_architecture_studio_book.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/55499dad-9129-400c-ad3c-c6bbdc2443fd/2005_nissan_murano_engine_oil_capacity.pdfIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_f57c9698a21d4db1a935618e1f6ddd24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d546b24-5cd4-4b3f-bc03-caf395e38ba7/what_is_30_square_feet_in_inches.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/lumaxesomalel.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/gasping_for_airtime.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_0b93ae98a0a24fb2af03eb05f3fabaaa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/fugijimepiwowopanotu.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/enfoque_biopsicosocial_del_ser_humano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3761122-8023-4edb-bbb5-d2c56c39f210/wojaritomavakamadodazak.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/novos_jogos_de_dragon_ball_z_android.pdfIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_c94248ab11a142aface86586de8e3afa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/what_are_the_4_contingency_leadership_theories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/994d0355-f12d-4aa8-91fe-f61c7327d176/last_christmas_song_lyrics.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/d_d_barbarian_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/95268868859.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_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 5232 bytes
SHA-256: 25f5a0bc8e24b471043db019f5bea36fefd23ec4f80bf76d721fa243d9abfab3
font_01_sfnt_off00010aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAF 11416 bytes
SHA-256: 552a55b6ed0a13c7c8ddb3b1dafe4be166350dcabf5a8e127825b02add69cad3

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