Malicious PDF — malware analysis report

Static analysis result for SHA-256 57fe6bbc5b134a5a…

MALICIOUS

PDF

68.6 KB Created: 2021-01-29 00:54:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3a2c0ed13358eca05be7f88145dbecfb SHA-1: 19e30081456dfa16bd2b7934afbe0d658e73c870 SHA-256: 57fe6bbc5b134a5a9408bab8fb8fabe10c9bd689cc6ddc9426f1797951b2a74d
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a large link farm pointing to PDF files. The document body, though heavily obfuscated, suggests a lure related to a 'service manual'. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://seumenha.ru/123?utm_term=onan+p218+engine+service+manual PDF link annotation
    • https://cdn.sqhk.co/pemejurove/Aid2iiE/ultimate_car_driving_classics_apk.pdfIn PDF document text
    • http://axecheat8.xyz/nolepexabei1nth.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/gc2igty/99766434471.pdfIn PDF document text
    • https://sererewaxux.weebly.com/uploads/1/3/4/9/134903335/wuvudefugovidaj_fujena_pilogoxu_dezup.pdfIn PDF document text
    • https://xibedawik.weebly.com/uploads/1/3/4/5/134584063/rozijipeg_jumazotifit.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/hggihVH/71605359117.pdfIn PDF document text
    • http://scriptbook.xyz/11945088701qd0bl.pdfIn PDF document text
    • https://xazonulukobimov.weebly.com/uploads/1/3/2/7/132712199/3a5958f0b.pdfIn PDF document text
    • http://lasns.fun/54861705834s5088.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/xia1hfM/kasufunot.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/gonugulifodawawofos.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/9581927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xamipekuxedatif.rf.gd/avid_pro_tools_11.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/kewisejekagolas.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/harmonized_system_codes.pdfIn PDF document text
    • http://girifej.epizy.com/sunakewakumasisogajew.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/risolebigizupami.pdfIn PDF document text
    • http://bitediwufekoxem.epizy.com/47170712993.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/falojedazumorovali.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/xejilimepadiletusuremok.pdfIn PDF document text
    • http://revobisamapekuz.epizy.com/eia_scoping_report_2019.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFC 5720 bytes
SHA-256: f8cba33e0b6812d75931681e4e4ff3bab9c0589c49883a951e4423107b1bf813
font_01_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 10280 bytes
SHA-256: eefab8e503a12c54e37445d4e7555265b3c218f716f00f3a21de345d3719fa85

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