Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4a9b0988da8029…

MALICIOUS

PDF

82.4 KB Created: 2021-05-17 23:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0f86fc2fe602f6dc794a04db5087423d SHA-1: 252ffd1d441dc425a381e10e450582d8df8ec4ff SHA-256: 6d4a9b0988da8029264794bcb90fb2943383b1ce608857caa594fcc994c19923
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to a 'Wansa gold washing machine user manual'. No scripts were extracted, but the presence of external URIs and the phishing classification strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://resalured.ru/strik?utm_term=wansa+gold+washing+machine+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421208/normal_6065c4cc48205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fc8eae433e02.pdfIn PDF document text
    • http://sabewasarakabi.iblogger.org/3d_bed_sheets_online_shopping_in_pakistan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_600f50ceb19a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502464/normal_5fe50b3d8dd37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_5fd3157eb5328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_606554e5c45ca.pdfIn PDF document text
    • http://xasanok.iblogger.org/jejeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5ff4de625b2ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_60677e392b875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_601f581f9c7bc.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
    • https://s3.amazonaws.com/nisiwanolom/spectra_s1_breast_pump_how_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6032d568-0553-4361-a61c-cd92fcebde3f/romeo_y_julieta_cigars_no_3_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22546e18-6198-497e-932b-1006768a1692/25086798316.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/acc_aha_guidelines_endocarditis_prophylaxis_2010.pdfIn PDF document text
    • http://navibizo.rf.gd/gawul.pdfIn PDF document text
    • http://zilapiwet.epizy.com/lotus_notes_10_client.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8548ae-562d-4bf0-8fbf-e12cca0ed3fa/bibufefafipuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/badminton_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/sears_1975_fall_winter_catalog_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787702ad-1031-41da-a98e-035e6aa741e0/trane_air_conditioning_manual_6th_edition.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_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 5260 bytes
SHA-256: cebcf33b51f7579e22c9f2cdae05461b6a2d1a8c768c3ee7f72acc0e40f2a4aa
font_01_sfnt_off000106ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AE 10928 bytes
SHA-256: 3c4676f29d6e4062b0bd6b0310f2a5ab246073b593ba8c6e59273db9c801f132
font_02_sfnt_off00012c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C24 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34