Malicious PDF — malware analysis report

Static analysis result for SHA-256 8647fbd00082af53…

MALICIOUS

PDF

51.0 KB Created: 2020-03-29 23:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5e5b7b4734ea255226e55ee48bddde19 SHA-1: eec8d8618ea07ffdc91dd889702bf65444c53c5b SHA-256: 8647fbd00082af53729e3eaf8dc348e7775c473fcb3f8fd1212a7a3d4eb881a7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. The document body itself is largely obfuscated but contains references to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 http://74-123-73-16.mgwnet.com/uploads/1/3/1/4/131453624/131453624.html#presentation+practice+and+production+method+wikipedia PDF link annotation
    • http://whitesflooring.com/uploads/1/3/1/4/131406248/jizuj.pdfIn PDF document text
    • http://earthwormbubs.com/uploads/1/3/0/6/130620677/xekafubozuki.pdfIn PDF document text
    • http://digitalstylehouse.com/uploads/1/3/0/3/130323754/0e7b8b6e5.pdfIn PDF document text
    • http://secrettreasuresuk.com/uploads/1/3/0/4/130476519/951274.pdfIn PDF document text
    • http://lovewisdomfractal.com/uploads/1/3/0/4/130492689/galivekegefo_xifuba_wusiwamufekuri.pdfIn PDF document text
    • http://srbluxuryhomes.com/uploads/1/3/0/7/130776295/dijamovifuvunibi.pdfIn PDF document text
    • http://emmett-technique.us/uploads/1/3/0/4/130483799/dekadonedugili.pdfIn PDF document text
    • http://visionsofadventure.com/uploads/1/3/0/8/130814040/afd9a.pdfIn PDF document text
    • http://oawtrucking.com/uploads/1/3/0/7/130740385/6561476.pdfIn PDF document text
    • http://webmail.sdmwoodworkings.com/uploads/1/3/0/2/130273616/2597973.pdfIn PDF document text
    • http://biblemindfulness.com/uploads/1/3/0/2/130291545/c351fd3d2df2.pdfIn PDF document text
    • http://fifthyearbrewery.com/uploads/1/3/0/7/130739967/zagudefabamowomixov.pdfIn PDF document text
    • http://journeyisthepath.com/uploads/1/3/0/4/130435771/b9f38782d724f32.pdfIn PDF document text
    • http://trustedfinancialpro.com/uploads/1/3/0/5/130550901/669661.pdfIn PDF document text
    • http://hamiltonsystemsintegration.com/uploads/1/3/0/7/130775958/16e952417.pdfIn PDF document text
    • http://roldanecheverria.com/uploads/1/3/1/3/131378821/2018108.pdfIn PDF document text
    • http://moreofthenatural.com/uploads/1/3/0/6/130604601/tefij.pdfIn PDF document text
    • http://cazzius.eu/uploads/1/3/0/2/130271195/494455.pdfIn PDF document text
    • http://damianiracing.com/uploads/1/3/0/2/130272892/fiwanutegaw-kujuguwowo.pdfIn PDF document text
    • http://vanbrunttransport.com/uploads/1/3/0/2/130273617/vagikapipagove.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
🗂 Part of campaign: hamiltonsystemsintegration.com 4 samples

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFC 8716 bytes
SHA-256: efbc3ccef5ff99ee98cee861246e562eeb25f4b611ca86d70898ff59ebd237b6

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