Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f5489791315eb6…

MALICIOUS

PDF

37.6 KB Created: 2020-05-21 22:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: a9963f782ad8f5ad8312e71ebc1a7f3d SHA-1: d34f54e40e3ea8f8bc4335542b8e19d30437c1af SHA-256: 48f5489791315eb6cf2e0a11bb00834608d6a9ddd8afab3182adc436ecb8f0f8
104 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting an attempt to distribute malicious content or engage in SEO abuse. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking links and downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://weballoon.org/uploads/1/3/0/8/130814923/130814923.html#doterra+clary+calm+pdf PDF link annotation
    • http://dryftrco.com/uploads/1/3/0/5/130539517/981e7382a5.pdfIn PDF document text
    • http://spotontherapycenter.com/uploads/1/3/1/3/131398009/pinaguk.pdfIn PDF document text
    • http://emilyaphotodesign.com/uploads/1/3/0/6/130620632/gitefuwevotuvug_vakatawo.pdfIn PDF document text
    • http://6thfloormusic.com/uploads/1/3/0/5/130542770/84b9c33d206180.pdfIn PDF document text
    • http://ponypoorartist.com/uploads/1/3/0/2/130291822/niluvubujari.pdfIn PDF document text
    • http://haritz.it/uploads/1/3/1/8/131871605/7765756.pdfIn PDF document text
    • http://lisaholisticbathandbody.com/uploads/1/3/1/3/131383609/5239598.pdfIn PDF document text
    • http://thebridgeofhopeinc.org/uploads/1/3/0/6/130639734/87a6bde820010.pdfIn PDF document text
    • http://joyschade.com/uploads/1/3/1/1/131164153/9783725.pdfIn PDF document text
    • http://outlastautodetail.com/uploads/1/3/1/4/131483025/6182289.pdfIn PDF document text
    • http://foryoufall.com/uploads/1/3/1/6/131636806/8a9f4c.pdfIn PDF document text
    • http://beautifulchristmaslights.net/uploads/1/3/0/8/130813898/miviw_zugenam_xiwixog.pdfIn PDF document text
    • http://brianedwardofficial.com/uploads/1/3/1/3/131380985/diminidosowuniner.pdfIn PDF document text
    • http://thejadecircle.com/uploads/1/3/0/7/130739119/15d86d2.pdfIn PDF document text
    • http://topnotchhomeimprovement.net/uploads/1/3/1/3/131398335/peburiwosesipus.pdfIn PDF document text
    • http://luv-a-bull.com/uploads/1/3/0/7/130739791/baleduvuduli.pdfIn PDF document text
    • http://taximurfreesboro.com/uploads/1/3/0/6/130620793/dojuzam_vudutegimuvuxuj_rabedodelaroti_ranokenoxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 1

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_off00006742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 10524 bytes
SHA-256: 741a04245041028c163e102808d14a6292fa99e3c6437a22d99641d735c746b8

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