Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ade3b48978243dd…

MALICIOUS

PDF

121.7 KB Created: 2021-01-23 15:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 83a4b34c3e2914d6b8528d25613218ea SHA-1: 2234ce017283f1c82cd0f528b9577102768f3a22 SHA-256: 2ade3b48978243dd70c249662255853e1a3c03748db9921b8be1a5e5f5141aca
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://trafffe.ru/aws?utm_term=tamil+guide+for+class+8 PDF link annotation
    • https://cdn.sqhk.co/feripamapuv/imvgfhf/tewofafulurezawil.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/hejjBev/11105615375.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/nogaxutasixibalak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482418/normal_5fc68f8221a45.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/taxaj_mumexozet.pdfIn PDF document text
    • http://palejep.22web.org/litamone.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://pejabefi.rf.gd/43809011860.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/tinkerer_build_guide_gloomhaven.pdfIn PDF document text
    • http://pupitudaxomibi.epizy.com/dukimijo.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/76954726192.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/40932707490.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/77587351335.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/65371775179.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/63644587916.pdfIn PDF document text
    • http://nanesipub.rf.gd/jikidemod.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016ced.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16CED 20564 bytes
SHA-256: dad0f4ecadba9ed4ef6e87ee2e2ee9c6ab0440dbe0d2de7961aa84fe2dc7ede2
font_00_sfnt_off0001507b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507B 3044 bytes
SHA-256: e3bade5a914f9f03121d816d8bcad604a7533ae82cd72c8d2631afae3395cb05
font_01_sfnt_off00015b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5A 5180 bytes
SHA-256: cf09b39aa35f18d671fa58526c29e530c2e0fc619a336c61dde0394196ac647e
font_03_sfnt_off0001992f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1992F 11712 bytes
SHA-256: 12d8c9254a0f7f72b5d380554019db7d9e2cae39cdeeb8b36cec1817e6336700
font_04_sfnt_off0001becd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BECD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_05_sfnt_off0001cccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCCD 2832 bytes
SHA-256: a12908a88df35a7e9eb57470e9a94a806bb52df392ce88a62d07cba2b79b9044

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