Malicious PDF — malware analysis report

Static analysis result for SHA-256 2476589a1d59f490…

MALICIOUS

PDF

81.1 KB Created: 2021-05-30 03:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ccde9f62ff9a7bbb3ec276aaf932c47 SHA-1: b1021a8a0a9c01583ab7eb0b1e146019cf893f59 SHA-256: 2476589a1d59f490eca5ddefb8ef44359691a53b8c8755eb732b1379198276ec
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicating a link farm or redirection strategy. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=dependent+origination+pdf
    • https://werikaduf.weebly.com/uploads/1/3/4/4/134483952/jitidonefi_disowowetakex_kopexapoto_sadugane.pdf
    • https://buvuramuva.weebly.com/uploads/1/3/4/3/134330057/5928925.pdf
    • https://povaxabo.weebly.com/uploads/1/3/5/9/135976235/1936913.pdf
    • https://cdn-cms.f-static.net/uploads/4411931/normal_60639ecabd3f4.pdf
    • https://mukokoloraji.weebly.com/uploads/1/3/4/1/134131612/5335725.pdf
    • https://cdn-cms.f-static.net/uploads/4391314/normal_600e33e993116.pdf
    • https://cdn-cms.f-static.net/uploads/4488316/normal_6065c77649f4d.pdf
    • https://cdn-cms.f-static.net/uploads/4369905/normal_604458f1218d8.pdf
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/vavutugaga.pdf
    • https://cdn-cms.f-static.net/uploads/4388824/normal_602290aec965e.pdf
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/10e5f7.pdf
    • https://perufagumitaxa.weebly.com/uploads/1/3/0/7/130738779/df61e.pdf
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/6835001.pdf
    • https://zedusolurifi.weebly.com/uploads/1/3/3/9/133999882/d09f8b.pdf
    • https://cdn-cms.f-static.net/uploads/4530937/normal_605322035e2cf.pdf
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/d13028.pdf
    • https://static.s123-cdn-static.com/uploads/4449602/normal_6000a1bf14e52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ad135b8-5fe2-47e2-a351-a81367873375/95599539010.pdf
    • https://uploads.strikinglycdn.com/files/0848973a-720f-411e-a965-798d7e8ab691/economic_nationalism_definition_ap_world_history.pdf
    • https://uploads.strikinglycdn.com/files/5e0de2d0-f8e3-487d-bafb-750c92988ded/90276167892.pdf
    • https://uploads.strikinglycdn.com/files/f84d9a0c-b56a-4b0c-b708-7548fa694853/jeu_de_carte_dalcool_a_2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010176.bin
8ae5d4a4f46c313c95b8dc93b6ee5d3b353f2a76cd6137ded1081d531e13959c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10176 5000 bytes
font_01_sfnt_off0001128f.bin
b22d457988391c315bbf3cb66ad0256ce356c97bd0368ef02f2afd74890a4aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1128F 10852 bytes

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