Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e3f506a93474bc…

MALICIOUS

PDF

75.7 KB Created: 2020-12-31 18:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4d1589e7842c830d0f45a000fb6349c9 SHA-1: 760e1ce17c705432cdec0de718421e7513fbabee SHA-256: 97e3f506a93474bc40bfdebe4dde4a7b14804f8ab68aefd1c008fe780b88b66e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, many pointing to disposable hosting services, and one link to a known malicious redirector. The embedded document body text appears to be obfuscated or corrupted, but the presence of numerous links suggests an attempt to direct users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://ggtraff.ru/123?utm_term=1995+ap+physics+c+free+response+answers In PDF document text
    • https://kinoxumore.weebly.com/uploads/1/3/4/4/134463035/tukokoda-zipega.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/8029562.pdfIn PDF document text
    • https://lodufowuk.weebly.com/uploads/1/3/4/5/134593986/2e4486e571f7.pdfIn PDF document text
    • https://nugizutotenit.weebly.com/uploads/1/3/4/5/134502776/minopa.pdfIn PDF document text
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/bizixikize.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/fakozutolatu_jepimunaxujod_soxiro.pdfIn PDF document text
    • https://vunesexub.weebly.com/uploads/1/3/4/4/134442538/jukizefanavukopox.pdfIn PDF document text
    • https://xomilazarega.weebly.com/uploads/1/3/4/5/134511507/lulisomegim-bipuzokom-monuki.pdfIn PDF document text
    • https://garigewofunem.weebly.com/uploads/1/3/4/3/134314314/mavexonezixewajebi.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/7931f5a29.pdfIn PDF document text
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/jexenuwenuvu.pdfIn PDF document text
    • https://rusajilema.weebly.com/uploads/1/3/4/8/134853265/7618310.pdfIn PDF document text
    • https://rurizurerenudiw.weebly.com/uploads/1/3/4/6/134649160/zenagenulutiri-pirakotesona-xetajeroga-fanavezuno.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/b9fdcb3dac7c35.pdfIn PDF document text
    • https://zomonuluxerow.weebly.com/uploads/1/3/4/8/134867862/e032aa0.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/senodiw/canon_t50_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/zirconia_shade_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD281 3340 bytes
SHA-256: c5999edef4d87360f49c39a973f53e468a2b6906cd0b9f67f15f05fe47278e6e
font_01_sfnt_off0000de84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 1768 bytes
SHA-256: 61220a0dae34d1298b72f9dc29e84aaedfd295c424e610d0b93cf322ab2cb80f
font_02_sfnt_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 5500 bytes
SHA-256: 8055662fa89b31a591da13a43bf102517ba1aaaf97cada53d49d83fc322d8259
font_03_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 11576 bytes
SHA-256: 20facfb3e6e90dc162136137593d9a3dff912ae620d33ceca9af0671744fc053