Malicious PDF — malware analysis report

Static analysis result for SHA-256 4149368a9e9bdab1…

MALICIOUS

PDF

79.3 KB Created: 2021-03-16 20:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 03efa14f3e079869e3b5714a8e6f1192 SHA-1: 7c558c0cc3372eee6f2bbf7dcb46db69f80900cc SHA-256: 4149368a9e9bdab1d41cf0060b5153b21188ec5c2a54f7c2fe57598de2671953
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, and is flagged by multiple heuristics as a link farm and potential phishing lure. The document body, though heavily obfuscated, contains keywords related to a game mod download, suggesting a deceptive lure. The presence of numerous external links indicates an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=pokemon+shuffle+mod+apk+latest+version PDF link annotation
    • http://gojawufeki.getenjoyment.net/30983754273.pdfIn PDF document text
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/7421830.pdfIn PDF document text
    • https://gopebuxagofu.weebly.com/uploads/1/3/2/6/132681698/5055397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446944/normal_601848c49e233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fd67d9204cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_60301872db03b.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/08e2e67b9.pdfIn PDF document text
    • http://nafepuzemobir.sportsontheweb.net/sojaxixu.pdfIn PDF document text
    • https://mivuwapirodi.weebly.com/uploads/1/3/2/6/132681474/258542.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/fourth_generation_cephalosporins.pdfIn PDF document text
    • https://jexelokase.weebly.com/uploads/1/3/5/3/135321670/xogukokatuzibe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529087/normal_5fe372f1bb264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453556/normal_60049ee791b1e.pdfIn PDF document text
    • http://delinapod.mypressonline.com/can_you_buy_big_little_lies_on_dvd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/fulonobopof.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_440fddea707d49e0aca7e2efc5c75376.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_af4fe98e2caa4607af553858244e7ad4.pdf?index=trueIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_dd87b5efcb4a4fa0811db9e84e6185af.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_57432111fb37478daf1a40a8200ef71f.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_ed4723ee7ff24e40b181054c34563f21.pdf?index=trueIn PDF document text
    • http://jatoxat.atwebpages.com/21373018787.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_off0000f997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF997 5404 bytes
SHA-256: 51d1c3b946af6836d4f8794d1b11f4c5d6d4b027523cf6b37ec57efaf036cd3a
font_01_sfnt_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 10704 bytes
SHA-256: 6472a4ec8b3c793cb32d459f42dd2dd5f4bdf1f5c81a61e86ec8a3d4f597ea4f