Malicious PDF — malware analysis report

Static analysis result for SHA-256 b371aec2bdceb353…

MALICIOUS

PDF

63.9 KB Created: 2020-03-10 06:38:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6151831ca7e48754bb0664eb968e90aa SHA-1: 160260daca02eefac32c3df45fc0b99c84fa9cf1 SHA-256: b371aec2bdceb3533967de3f0e47e0ea1021c3a2406f53dd1d1251e9ecf10327
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The primary heuristic identified a link farm with 30 external PDF links, suggesting a coordinated effort to host or redirect to potentially harmful files. The document body contains garbled text and metadata from wkhtmltopdf, indicating it was likely generated programmatically rather than being a user-facing document.

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://a1209599xstreamtravel.xsideas.com/uploads/1/3/0/7/130776521/130776521.html#aplastic+anemia+survival+rate+age PDF link annotation
    • http://salinaseminarseries.com/uploads/1/3/0/6/130639590/redak.pdfIn PDF document text
    • http://delegationband.com/uploads/1/3/0/8/130813738/18cf000c458e0d.pdfIn PDF document text
    • http://toneboxdigital.com/uploads/1/3/0/5/130551805/misopanuwiwedar.pdfIn PDF document text
    • http://lianacassar.org/uploads/1/3/0/5/130590687/gawudip.pdfIn PDF document text
    • http://wickedkandles.com/uploads/1/3/0/6/130604127/6067015.pdfIn PDF document text
    • http://garbervillerodeo.org/uploads/1/3/0/6/130620968/9990566.pdfIn PDF document text
    • http://everythingessentialblog.com/uploads/1/3/0/7/130739697/9072516.pdfIn PDF document text
    • http://www.rockwoodreadings.com/uploads/1/3/0/3/130323335/nuporexuk.pdfIn PDF document text
    • http://bestcollegefootballplayoff.com/uploads/1/3/0/4/130488699/mutasavilubesax.pdfIn PDF document text
    • http://chloecustomcollections.com/uploads/1/3/0/2/130289246/zufabegizani-xereniwi.pdfIn PDF document text
    • http://eis-breeding.com/uploads/1/3/0/8/130814714/29fa4c71912.pdfIn PDF document text
    • http://www.tricountyofficespace.com/uploads/1/3/0/6/130605240/denoregejosimo.pdfIn PDF document text
    • http://daveformaine.org/uploads/1/3/0/7/130776865/jujitire.pdfIn PDF document text
    • http://asleepwalkersguide.com/uploads/1/3/0/8/130814596/fabedesokoxejegom.pdfIn PDF document text
    • http://ppas2020.com/uploads/1/3/0/6/130605389/ribonuzu_zedajofi_tolemuwaxives.pdfIn PDF document text
    • http://krazyketomom.com/uploads/1/3/0/6/130640029/b86409e23e2544.pdfIn PDF document text
    • http://tiered-educational-consulting.com/uploads/1/3/0/2/130270836/f8b9115.pdfIn PDF document text
    • http://eehenry.com/uploads/1/3/0/3/130313149/liverakejuzode_kulugiluwi.pdfIn PDF document text
    • http://www.johnnyraygibbsactor.com/uploads/1/3/0/7/130739445/zazolokubap_ruzipedi_xureranuwamagap.pdfIn PDF document text
    • http://www.topthreespots.com/uploads/1/3/0/9/130969034/rinozubujilan.pdfIn PDF document text
    • http://mail.kwb-vlaanderen.be/uploads/1/3/0/7/130739525/8958623.pdfIn PDF document text
    • http://mail.emilyyearsley.co.uk/uploads/1/3/0/7/130776228/c8789a987.pdfIn PDF document text
    • http://littlehouseonthegrid.net/uploads/1/3/0/4/130478868/57043e099442862.pdfIn PDF document text
    • http://www.usabeachtour.org/uploads/1/3/0/9/130969434/2586264.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

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_off0000d069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD069 8184 bytes
SHA-256: efba1a24dd13018d5ad44ca4fdcee43312f2fab3d19b8971818c370c6a7d6b14

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