Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5dcc3f06512cee…

MALICIOUS

PDF

73.9 KB Created: 2021-01-14 23:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7333e9cb389af90e7f3a8e91ce17eb12 SHA-1: dfe3471df9b0d56e7914e72562395d3bfb107bbe SHA-256: fb5dcc3f06512ceeb0f064eda3117919cecd58afda56420b8317ad1cfaae32f7
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm designed to distribute malicious content or phishing lures. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=cd+burner+free++filehippo In PDF document text
    • https://cdn.sqhk.co/takejirasomu/gdxBrRZ/7101791856.pdfIn PDF document text
    • https://site-1177469.mozfiles.com/files/1177469/loxalez.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/BZjggiS/11210643441.pdfIn PDF document text
    • https://cdn.sqhk.co/rowofabuf/gcjfS38/nirekodifomimosaduvuv.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/pVcjbij/kaxuwewajomadomul.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/hiM4QmD/retomipoxuzi.pdfIn PDF document text
    • https://site-1175125.mozfiles.com/files/1175125/steel_ball_run_anime_watch.pdfIn PDF document text
    • https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/garepimerawifa.pdfIn PDF document text
    • https://site-1172011.mozfiles.com/files/1172011/sovoxunarobejanu.pdfIn PDF document text
    • https://site-1174352.mozfiles.com/files/1174352/zubusajimofegamirilid.pdfIn PDF document text
    • https://site-1172726.mozfiles.com/files/1172726/14288937337.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mubefula/chromium_os_x86_iso.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_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 4788 bytes
SHA-256: 4ce3f7aeaee167dcf0dfee012bc78eab9439b16542199c357bd8d29107f5b60a
font_01_sfnt_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 10312 bytes
SHA-256: 632a014b505cbdbaf20f5306025209ea773f24c5b98c7dcd6d3e719e74ec6a96

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