Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f885cc38615500…

MALICIOUS

PDF

89.0 KB Created: 2020-12-18 05:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d1e7858a6f0c6a6bae59b63d7ff651f9 SHA-1: 9ce9710b2a08278ec957518ee131f2543b2709e4 SHA-256: 50f885cc38615500e9bf0f386e4c7c036a946ad53d65415bf60567d7705c0922
244 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. One critical heuristic indicates a link to known malicious redirector infrastructure, and ClamAV detected it as Pdf.Phishing.Trojan. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content, further supporting a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffmen.ru/strik?utm_term=blue+devil+radiator+flush+sds In PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/punuserenum_nosobuvar.pdfIn PDF document text
    • https://zogefiwodojur.weebly.com/uploads/1/3/4/3/134310711/5237118.pdfIn PDF document text
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/xavipip.pdfIn PDF document text
    • https://nuzibekupin.weebly.com/uploads/1/3/4/3/134338080/kapasu.pdfIn PDF document text
    • https://wulejowaru.weebly.com/uploads/1/3/4/8/134886315/eef5c89b2d49a7.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/d702df39f4.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/mateliwobesurubovox.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/pizaxidiv.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
    • https://s3.amazonaws.com/forupokisip/handball_games_video.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/37314083976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adedf6b3-b14f-4c42-8e25-190681075997/kuzozu.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/93585350191.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000116a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x116A6 27432 bytes
SHA-256: f7621615c6e4f5e188640b72489372e4a353109533f615fe25dda6aef9b874bb
font_00_sfnt_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 4880 bytes
SHA-256: 70929230950584c9f6ff2e8bdd7d4b31927f0cae656496c685b604ae0186ad36
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 10820 bytes
SHA-256: 8075746dbe94d24c703ad291728b0bdf01f40e70d715145c2c5d6b2f7902db00
font_03_sfnt_off000146fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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