Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc733a30cbe3bfc…

MALICIOUS

PDF

78.0 KB Created: 2021-03-07 06:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8f026a41bbff57ce94f4be6e8de86c47 SHA-1: a12450fc37b15b3867a460f88a0daa7ae00b7c22 SHA-256: bfc733a30cbe3bfc0eeeb0cb8ccf70e5cce53ebfbd6943588f96f8a7f85e951f
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious or phishing content. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of external URIs suggests an attempt to lure users to external sites. No scripts were extracted, but the overall structure points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/aws?utm_term=math+171+ucla PDF link annotation
    • http://fufejezonodim.mywebcommunity.org/bukinabowotaxizevoxuto.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/what_is_the_us_constitution_for.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/2075737.pdfIn PDF document text
    • https://tababara.weebly.com/uploads/1/3/0/7/130739165/09e2b09.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/7353697.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/gusizip.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/togawer_vubibujiwaxe_lobevedemarimir_joluz.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/bepuginirazeteko.pdfIn PDF document text
    • https://jarivilil.weebly.com/uploads/1/3/4/0/134012847/fukakutegoma-delozumarot-ruloz-ridemerojafip.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/wikidu.pdfIn PDF document text
    • https://lisumefi.weebly.com/uploads/1/3/1/4/131408082/vunisojod.pdfIn PDF document text
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/b05ecd0dc89.pdfIn PDF document text
    • http://kevakigev.medianewsonline.com/density_of_salt_dissolved_in_water_is_a_solution_therefore.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/faeafde6-e66f-40fc-be3e-5186e339e456/is_panda_express_teriyaki_chicken_keto.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/the_standard_insurance_dental_provider_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e045421d-8a77-4250-abc1-8417bfe6d964/tipo_de_comunicaciones_que_existen.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/fiber_optic_communication_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4771fd8-340f-4af8-9e3f-9774cbd8ee8d/jogomamewakudimofopigul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04a3d5c-ace0-4af5-8438-b3953799b020/john_deere_310_backhoe_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f605e0f-9e7b-4dbd-b0a9-01cac3d6d4ae/waxanituxajoxilibonevep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef8f5df-3213-48b9-9b59-828f4b5f0f2e/como_agua_para_chocolate_laura_esquivel_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27314c7-7348-4d3a-8eb3-b6b5d090e7de/zilale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76198c6-8990-4368-abb9-dd9840aa158d/xirarinowukomewoselixowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576710eb-439e-4cf5-8f42-9a041e4c0e19/viminategunotovudosex.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_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 4752 bytes
SHA-256: bcef1be9c7d71f0a3f92cadbfaef5134071a0842258413f9a3e840f658d93686
font_01_sfnt_off000104e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E8 11380 bytes
SHA-256: 6e4c86bbe05a82235b1bb5e5efbbac078f9433deee9041b4d9e6b3a2b16f2107