Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ddec73fc23cfea…

MALICIOUS

PDF

112.6 KB Created: 2021-02-21 21:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bca50dda10983095f78128e6c25c4751 SHA-1: 0114153c030a6df852ae75b4e80712a4bd3d344d SHA-256: 88ddec73fc23cfea45fb2a265a16a630c2d27eebea458028c9d22e4f58353a85
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains numerous external links to disposable domains, indicative of a link farm designed to host malicious content. The presence of a 'download button' heuristic further suggests a lure to trick users into downloading files. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely serving as a dropper or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://baarspo.ru/wix?keyword=sony+walkman+apk PDF link annotation
    • http://gratoram.site/22423811893giroi.pdfIn PDF document text
    • http://sallles.ru/shyam_bhajan_video_song_freec12dj.pdfIn PDF document text
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/409605.pdfIn PDF document text
    • https://zafubunemajuz.weebly.com/uploads/1/3/5/3/135314528/9151222.pdfIn PDF document text
    • http://azules.ru/zazakowutezebao46e.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/vafan_munikenore.pdfIn PDF document text
    • http://nafesotarun.22web.org/carabinieri_uniforme_gala.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/rajapufus.pdfIn PDF document text
    • https://kegadurab.weebly.com/uploads/1/3/4/0/134096735/1498513.pdfIn PDF document text
    • http://mailedflkf.site/curriculum_vitae_template_doc_south_africalt18b.pdfIn PDF document text
    • http://bighome.space/free_online_website_image_erzlek0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fubegamo.epizy.com/81418629865.pdfIn PDF document text
    • http://runoxujozu.rf.gd/gupote.pdfIn PDF document text
    • http://faluzaxubip.epizy.com/40291563965.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_off0001644f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1644F 5052 bytes
SHA-256: 6e710cb3a54ec441a7c579387d38b5711ebaeef8d505bf8c07b4ded44b57e259
font_01_sfnt_off00017586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17586 3024 bytes
SHA-256: f747eae70b613a7addfe878d940650e583504124e476350495eb712ecf3e0446
font_02_sfnt_off000180b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180B5 16436 bytes
SHA-256: 568f4a8225e81444c1e5221ea23a03b4dc787cb12b4095f291aa0f5d9891073a

Open this report in the interactive analyzer, or submit your own file for analysis.