Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddf592a0ccdd42e…

MALICIOUS

PDF

43.1 KB Created: 2020-04-01 14:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: ef7c0c269635d3a36cd78374ad9a6f88 SHA-1: 2ec915602d39d3eee79c3a4955913ff3eb763661 SHA-256: dddf592a0ccdd42ea4d58ccad0f72145af64ecd7e135c62da1da075a58c307b2
104 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to other PDF files, characteristic of a link farm or SEO spamming technique. The document body explicitly mentions downloading a "prezi app for free", which is a common lure for distributing malware or leading users to malicious websites. The presence of numerous PDF_URI and PDF_SEO_LINK_FARM heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://buyorsellyours.com/uploads/1/3/0/8/130813740/130813740.html#download+prezi+app+for+free PDF link annotation
    • http://slienthill.org/uploads/1/3/0/8/130813997/6769638.pdfIn PDF document text
    • http://jobsholic.com/uploads/1/3/0/3/130379251/9484975.pdfIn PDF document text
    • http://riggseducationalservices.com/uploads/1/3/0/8/130874309/2551642.pdfIn PDF document text
    • http://independentit.net/uploads/1/3/0/3/130313180/watijonus-govoxuzifekun-muterelopibanu.pdfIn PDF document text
    • http://mindfulhealthpgh.com/uploads/1/3/0/8/130874091/gurupenozobeg.pdfIn PDF document text
    • http://emmafretts.com/uploads/1/3/1/4/131407351/midebuw.pdfIn PDF document text
    • http://globaledleadership.com/uploads/1/3/0/9/130968913/7314144.pdfIn PDF document text
    • http://abovethecloudsretreats.com/uploads/1/3/1/4/131407281/2544768.pdfIn PDF document text
    • http://bviico.com/uploads/1/3/0/8/130874180/tavuwufazo-gidixotesikaji-nidesurezirunap-lajinepo.pdfIn PDF document text
    • http://daturafashion.com/uploads/1/3/0/5/130590054/60cc6c2843b.pdfIn PDF document text
    • http://realestatebizcoaching.com/uploads/1/3/0/5/130540211/muvewela.pdfIn PDF document text
    • http://elisabethcaregroup.com/uploads/1/3/0/2/130288310/xakodi.pdfIn PDF document text
    • http://kiyaella.com/uploads/1/3/0/6/130640052/dekejo.pdfIn PDF document text
    • http://tweezty.com/uploads/1/3/0/2/130289375/vokavasogog.pdfIn PDF document text
    • http://clarkdentalassociates.net/uploads/1/3/0/7/130739789/madarirekep.pdfIn PDF document text
    • http://hewmatt.com/uploads/1/3/0/9/130969191/goxujesesiboxefiv.pdfIn PDF document text
    • http://denadel.net/uploads/1/3/0/5/130551922/1240379.pdfIn PDF document text
    • http://happydogsaigle.ch/uploads/1/3/0/6/130605498/8755625.pdfIn PDF document text
    • http://privasack.com/uploads/1/3/0/9/130969439/lotituletale-lujukifona-jagosiz.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 2

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_off00007e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 8528 bytes
SHA-256: 811e142b873a5c8bc0af11df68aa379f0098bd9fc0b7234a430118ccce99502a

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