Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a35fc1b0377d50…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 07:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1f60de202aba55ef04084bddad8c45e0 SHA-1: ccca11ef7daded591145f1810d8358dc56561969 SHA-256: 16a35fc1b0377d50d64f8ccaec1d914ff8f3ad58d8c42c1bf11556907e6d721d
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=jio4gvoice+apk+free+download PDF link annotation
    • https://mojikusabuja.weebly.com/uploads/1/3/5/3/135301399/puwevazidode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375891/normal_5fdecc12e4ff7.pdfIn PDF document text
    • http://bloomwithdeanna.com/495350106774hgo8.pdfIn PDF document text
    • http://eurosett.net/gospel_song_jesus_youre_the_center_of_my_life5vsws.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/dotumonuduju-sasavo-pomigamejebu.pdfIn PDF document text
    • http://opendouche.xyz/amide_bond_formation_in_dmsoz9tms.pdfIn PDF document text
    • http://montana-media.com/labosazidinjjd0k.pdfIn PDF document text
    • http://myluckywin.site/domilutidojovoladinanuasp0w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479715/normal_5fc6128b78aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_6027395dcd1c2.pdfIn PDF document text
    • https://xubawiki.weebly.com/uploads/1/3/1/1/131163512/e86bcd.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/bamoromivirad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fe79632e3628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wowulikuvej.rf.gd/belt_size_guide_womens_uk.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_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 5440 bytes
SHA-256: d33b929f3ad953b5e02a3bbf7e5edcf66be89af13d5763df428f49e056631e8b
font_01_sfnt_off0000f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 10296 bytes
SHA-256: fbf4cc7aeb3f728010cf147bc73b3d1fc5e7fb3f95aa1317ae6eb282128173e4