Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c604496a0ac730…

MALICIOUS

PDF

89.4 KB Created: 2021-06-12 01:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d539e5d30c763fd6d8a90f3298b341f6 SHA-1: e0406e59aee11e895bb862da16646de2cbb28fa7 SHA-256: c9c604496a0ac73046f82bd5655548dc2974919d3e69ad451e8e3dbb0f26606a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with a primary suspicious URL being https://pistant.ru/pbw?utm_term=wps+wpa+tester+free. The heuristic PDF_SEO_LINK_FARM suggests the document's purpose is to generate traffic or SEO benefits through a mass of external links, potentially leading to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pistant.ru/pbw?utm_term=wps+wpa+tester+free PDF link annotation
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/14defccf.pdfIn PDF document text
    • https://vusutiti.weebly.com/uploads/1/3/4/7/134762674/zobibaw.pdfIn PDF document text
    • https://figeneluniw.weebly.com/uploads/1/3/4/8/134857588/molotekaxapafilulawo.pdfIn PDF document text
    • https://zanomegujinax.weebly.com/uploads/1/3/4/8/134873542/bolawimubofas.pdfIn PDF document text
    • https://bifimazetaxa.weebly.com/uploads/1/3/5/3/135326975/lewerizagopu.pdfIn PDF document text
    • https://xanilavobug.weebly.com/uploads/1/3/5/9/135959945/zomibudetew_xikefobewis_kilifomope_fijonejesino.pdfIn PDF document text
    • https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/marefawusajise-kadiledi.pdfIn PDF document text
    • https://fojevuresuzuj.weebly.com/uploads/1/3/4/8/134881640/cdef1273092.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/9105433.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://uploads.strikinglycdn.com/files/5cec5a74-baea-4906-988a-291cafc749b4/rowufatewoten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80dc263-b58c-4530-a9d2-b04f54e75084/83366286248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb914ab-a588-488a-9ebf-61f281df4e38/chicco_keyfit_35_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a750cda-6b52-4ede-b751-5b97d6856ede/hp_color_laserjet_cp1215_driver_mac_el_capitan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1b12d1-0a15-47be-8c08-0245287d1abc/1996_ford_ranger_xl_specs.pdfIn PDF document text
    • http://natutaliva.pbworks.com/w/file/fetch/144539955/retupaberapaxalenapubofex.pdfIn PDF document text
    • http://sowenux.pbworks.com/w/file/fetch/145160997/rotazonanububad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4805bee-d20a-48e9-a35d-b3a802d8eeb3/87103215897.pdfIn PDF document text
    • http://vatezerajigo.pbworks.com/w/file/fetch/144736155/wabuwogavibiku.pdfIn PDF document text
    • http://wotasaful.pbworks.com/w/file/fetch/144627381/zawigopuda.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/w/file/fetch/145133544/hard_and_soft_g_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315af411-d9bf-49eb-8fed-1644ef6c5e33/a_concise_public_speaking_handbook_5th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a4f0a6-0e69-43f0-9cc0-c01e6b05010f/long_me_lachi_mp3_song_download_dj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10ce58c-891c-4cee-9203-04c70567f039/gabajide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 4492 bytes
SHA-256: 1ec90d1af78ce3ae89cdcabd44f2dec2b6042d5ea894d62f96a29c6e1472a113
font_01_sfnt_off0000fb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 1940 bytes
SHA-256: e6d5f4324b168664fd4da9de57cdfa04594fe49627acb40df87ebfa60c8ed5f2
font_02_sfnt_off00010457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10457 14808 bytes
SHA-256: 21b5ad183947da450c49c37796f38b4d7286778577edec74facea63526f8602c
font_03_sfnt_off0001336e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336E 16436 bytes
SHA-256: e53500898b8c448ac7415b736f9b2a97d2a20fc04092a8499ea2085e2dffe5e7
font_04_sfnt_off00014980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14980 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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