Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bef15f544c3eb9…

MALICIOUS

PDF

55.1 KB Created: 2020-11-09 12:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5f1445d59bd0502907295024d5b254ba SHA-1: 16772a400ba97c3e44cf5eb291170da9b44121bf SHA-256: 27bef15f544c3eb9515c8f493d0b30d308709a0839910adbf1db4b79532b9cdd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/123?keyword=loomis+method+face In PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/nulini.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/vudiputo_rosufu.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/sivotoluv.pdfIn PDF document text
    • https://digulowewuw.weebly.com/uploads/1/3/4/3/134363346/dijufexa-wakekenotas.pdfIn PDF document text
    • https://dasasaperot.weebly.com/uploads/1/3/4/6/134665710/mezijofowubazegix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/pig_out_charlottes_web.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64331596-3456-4437-bc84-95d75ecb1239/diwopasolapodazoraduse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404ae375-3eab-4227-9044-0c87c1963571/bidareneje.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/73620761214.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/simile_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/alteraciones_morfologicas_de_los_espermatozoides.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7E 4756 bytes
SHA-256: 5a701d889fb866079e31c7663c0f979f00f3dffc3e148862c52f76600db4bfac
font_01_sfnt_off00009eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB2 10192 bytes
SHA-256: 720cc4e1c139e4ffce2b80a01c0d115dd8ef5e333b9ae9fab6cc5141d6a816b3
font_02_sfnt_off0000c1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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