Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e70e1e5a3ba73b6…

MALICIOUS

PDF

74.4 KB Created: 2020-11-18 10:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1b6fdff5046b086058858cff691ba59f SHA-1: 293cf61f8ba20529a8b232e71fd7fcb9f1205f66 SHA-256: 2e70e1e5a3ba73b60851f83592237dbb36c810b54ffb8c711a1e5000dc51c519
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 hosting or redirector infrastructure. The heuristic firings indicate that this PDF is designed as a link farm, likely to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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://ggtraff.ru/aws?utm_term=ansible+template+directory+structure In PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/6941125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f896dcae3eb6.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/melufazap_jabax_vovefef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f8aafb883b34.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/renevejuxakazixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468270/normal_5fa857d06121a.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/fotilazuzavabojepuja.pdfIn PDF document text
    • https://zozunane.weebly.com/uploads/1/3/4/3/134316446/kufaf.pdfIn PDF document text
    • https://kigikosofo.weebly.com/uploads/1/3/4/0/134041402/ae8ad0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_5fb46455aee77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5faa2a4119be5.pdfIn PDF document text
    • https://jetizezososexu.weebly.com/uploads/1/3/4/3/134352600/f8391ba2e38aa0.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/muxer.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/sigobija/wivaregazevogitiwufex.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/xepumedixukemebib.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECE 5452 bytes
SHA-256: 8df68fedf7fae2258cfdb3753bb63400a6d96afc86f49c8f96a7e5380bbd48b4
font_01_sfnt_off0000e13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 10692 bytes
SHA-256: 72d0228db14c6d71ae26ed701594be6ee12f4db2409da902f0d945ec9aa12789
font_02_sfnt_off00010627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10627 16424 bytes
SHA-256: fc293b648859296a377f5a4495a39eec48fcbb92a45f6ee0871ee40496438204