Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9f5ff6bfadd21a…

MALICIOUS

PDF

47.8 KB Created: 2020-11-03 16:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1957e21665ea325c907f23e9f98facdc SHA-1: 9a36b915dd8a50c0a7cfa220627332ce3dc49efe SHA-256: 4e9f5ff6bfadd21a21d4d80eef4d480ada4a81338eb6d5f65984953e5864d089
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, suggesting it is designed to drive traffic to potentially harmful content. The document body text and embedded URLs indicate a lure related to game hacks, which is a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?keyword=asphalt+8+hack+apk+download+pc In PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/dunejeso-runimuxu-wilotuwis-fuwatujunoninir.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/bojotigidinujota.pdfIn PDF document text
    • https://moxitason.weebly.com/uploads/1/3/4/3/134384587/lujixa.pdfIn PDF document text
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/c2d6976949f59.pdfIn PDF document text
    • https://xexegetogud.weebly.com/uploads/1/3/4/3/134375989/miwebet.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/588597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae00d79-6075-4bc1-a8e3-512b06ddb78d/notenikojojenogobipegid.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/kepalosuketage.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/levutukifetixirine.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/20992457703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2530/9108/files/vileda_1-2_spray_mop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/tixivawanigavameb.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/bodusiroxepomamivopalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/8.snf_sosyal_bilgiler_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2cdb905-0a8f-4e96-8085-690711243a7a/fundamentals_of_electric_circuits_sadiku.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_off00007a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7F 5404 bytes
SHA-256: 3ee7642c8309f882a0b7f64e5eba864a5b4e2b70e078bb17f4983eb93b46d013
font_01_sfnt_off00008cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 11036 bytes
SHA-256: 3fbc6f29594439f30ad2eeda19f18843a174c7d8702335d6c2c9da403aa85d9c

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