Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcf2f01d1b2ca7a…

MALICIOUS

PDF

82.0 KB Created: 2021-02-28 12:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e279886e897baa1a13566275d0858a16 SHA-1: de3038abc2ab01b949927a1efb4ed6262ca3b665 SHA-256: bfcf2f01d1b2ca7a32bbc8eecb8cef227371eb365f49f3ebf10661770f6fe1ff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a deceptive lure related to technical queries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=how+to+delete+auto+backup+pictures+on+samsung+tablet+4 PDF link annotation
    • http://slamelina.website/free_streaming_software_for_androidczind.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393485/normal_5fcc2ccb683a1.pdfIn PDF document text
    • http://help-copyrighteamservice.com/vifivaxalikelujuvozenijw5zt1.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/X4SFhjv/poultry_seasoning_recipe.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/52701211093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378167/normal_5ff1cc9a25dc2.pdfIn PDF document text
    • https://cdn.sqhk.co/dinewemilo/DOhdlPT/67798078269.pdfIn PDF document text
    • https://nipizizit.weebly.com/uploads/1/3/0/9/130969905/75eff.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/78015012992.pdfIn PDF document text
    • https://valutakawewa.weebly.com/uploads/1/3/1/3/131378791/webowofukowajekumumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_6017c635f3d0e.pdfIn PDF document text
    • http://stroy-level.ru/education_franchise_agreement5bt2j.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/xiwixanagodukado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5fe0272b90c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_602c255e2b1d1.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/bikebofi-fogozimufat-piserojol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495392/normal_5ff78cb516d86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_5fd0f013e1d92.pdfIn PDF document text
    • http://natlegend.space/9255373347cy255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384652/normal_60382fc27b706.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
    • http://zitulogakapede.myartsonline.com/fozinepekupobewukuv.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 5620 bytes
SHA-256: 32752f80d02d79c2fd7a81fa76a4f8f2e5f45481246e773602e5130354873bbf
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 10532 bytes
SHA-256: fb3ca3c86c854e17764990bfa5c634b4820b38141d4f2fc90f57cfe467cf87d6
font_02_sfnt_off00011682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11682 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off00012baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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