Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76cd0ea4d7ba57e…

MALICIOUS

PDF

77.2 KB Created: 2021-06-09 08:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d654358442d7b04b519e67a416575ad9 SHA-1: 3cab8b778d424fdb847f9304cde84f38bd53da42 SHA-256: d76cd0ea4d7ba57ee127d68f12d8f7d1e98574ad7ef635de62047ee84df5ba1e
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous external URLs, including one that appears to be a lure for downloading modified software. The presence of multiple PDF links and disposable hosting suggests an attempt to distribute potentially unwanted or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://philabc.ru/pbw?utm_term=download+the+sims+freeplay+mod+unlimited+money PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477162/normal_6041a05e22893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_6062fbe1872c9.pdfIn PDF document text
    • https://nigefidapeb.weebly.com/uploads/1/3/4/3/134385669/xaposoxixejufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_604ca3997be35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_6069e36f62972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_5fd60dd1e9270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474222/normal_5fe4cd925d0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_606d930cd818b.pdfIn PDF document text
    • https://xizexinapak.weebly.com/uploads/1/3/4/3/134359948/7aa6611731f.pdfIn PDF document text
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/bidiwabafaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_603b0e6da345e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4408001/normal_60b40eb8f3982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_604d61b583b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_601709ac2d5fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369783/normal_5fe4ea87d513a.pdfIn PDF document text
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/lozobugozamavel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_604648d55f6ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493916/normal_60ba9ae147728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_603c214f6a502.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://depowota.pbworks.com/f/97055620893.pdfIn PDF document text
    • http://ruwomodanom.pbworks.com/w/file/fetch/144480399/henna_tattoos_arm_tattoos.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144793758/wuganuleraziguvet.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/pojevema.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/xojifizagorepe.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/70849991537.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_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 5472 bytes
SHA-256: 62aaac0e855800a030dd011f14752863aa6e553d861eebb69f43dec7484c07e3
font_01_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 12256 bytes
SHA-256: 8a22f57b7be694096c91ef1bd398891dfa80f2141cb2800c381ac0cba2540524