Malicious PDF — malware analysis report

Static analysis result for SHA-256 19715df0707ae092…

MALICIOUS

PDF

82.0 KB Created: 2021-03-22 15:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71a54f8cf8c6ce07eef0c020d5529fb5 SHA-1: ae9d0f7530fe7cc4cce9abe0c806a8d725a5e112 SHA-256: 19715df0707ae0920556b756b414bcaf9a84e595005a1748d11e95646a3e7daf
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to 'Epson 2540 printing problems', indicating a lure to attract users seeking technical support or information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=epson+2540+printing+problems PDF link annotation
    • http://yblda.fun/99540819250yu5xf.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/bodaj.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/bidgd95/sukinedirunanasikewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_60111f3032726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_603c03d047cc1.pdfIn PDF document text
    • https://vawilateg.weebly.com/uploads/1/3/4/6/134697686/ad52e22.pdfIn PDF document text
    • https://jesokawafaz.weebly.com/uploads/1/3/4/6/134626724/279efe2c4.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/gdIZihE/kowekota.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495395/normal_6003b3b57c76a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_5fd81790e37f2.pdfIn PDF document text
    • http://lovepositions.info/japujatusetaxugasp3kw.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_603f07be67e8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdfbcf085f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_6038e2d65a894.pdfIn PDF document text
    • https://guxitokos.weebly.com/uploads/1/3/2/6/132681611/rikelagof.pdfIn PDF document text
    • http://hookup668.site/nkjv_biblefkxny.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/3420253.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/eAgc1ic/traffic_rider_mod_apk_download_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_6056ab9921870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_60293a64a0b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_60366b9ac963d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416132/normal_602f6e274823e.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/qwjaRgg/oscar_grant_plaza_oakland_protest.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392664/normal_5fc816d9085a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_60469020b083c.pdfIn PDF document text
    • http://axecheat9.xyz/xupiwidisukovijawu6v60v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10256 5512 bytes
SHA-256: 9552a86a6d04d9472b882931d14aa588c09e55d55cfd330ade146b6a397859f6
font_01_sfnt_off00011513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11513 10996 bytes
SHA-256: 0040e63b8a79449ad6abb2957c86fb521decede2ee07d385def071e04b4b88da