Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fecf44d4672f820…

MALICIOUS

PDF

34.9 KB Created: 2020-05-22 13:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-07-24
MD5: 6547d7c7245e8f9c343b652b3d93a4cc SHA-1: 3bfc32824d6c9eda60a49b7107b440c4246fe965 SHA-256: 8fecf44d4672f820d0617328a22e560710b9e853fef2371c231a3414dc86c3e7
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for malicious content. No scripts were extracted, and the document body primarily contains metadata and the list of URLs. The primary attack pattern observed is the mass distribution of links, likely to manipulate search engine results or to serve as a landing page for further malicious activity.

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://bodymotivation.net/uploads/1/3/0/6/130621421/130621421.html#abdominal+bracing+exercises+pdf PDF link annotation
    • http://washingtoncoasthomes.com/uploads/1/3/0/4/130476359/91c4db447114c.pdfIn PDF document text
    • http://anynumberofbirds.com/uploads/1/3/0/5/130588547/narixonikoze.pdfIn PDF document text
    • http://thatsthewaybbqgo.com/uploads/1/3/0/5/130550895/3548202.pdfIn PDF document text
    • http://onemillionhusbands.com/uploads/1/3/0/9/130969259/8880225.pdfIn PDF document text
    • http://symonsvalleyranch.com/uploads/1/3/0/8/130874530/9368334.pdfIn PDF document text
    • http://mdhomelab.com/uploads/1/3/0/3/130313122/0691ec.pdfIn PDF document text
    • http://backtoblessings.com/uploads/1/3/1/0/131070867/9744472.pdfIn PDF document text
    • http://eyezbyk.com/uploads/1/3/0/3/130313359/matutazij-xokugukiberomu-gamogogube-govogox.pdfIn PDF document text
    • http://krasnoludkow.pl/uploads/1/3/0/6/130621284/b0cf585a0.pdfIn PDF document text
    • http://ms-wendys-class.com/uploads/1/3/0/2/130272470/gimosonev.pdfIn PDF document text
    • http://chrismorleyhypnotherapy.com/uploads/1/3/0/2/130289205/walipon.pdfIn PDF document text
    • http://wiseworkflows.com/uploads/1/3/0/7/130739987/3349298.pdfIn PDF document text
    • http://cassandrascateringandmeals.com/uploads/1/3/0/8/130874368/xotizefebir-sijunu.pdfIn PDF document text
    • http://themightywonders.net/uploads/1/3/0/6/130621846/1783670.pdfIn PDF document text
    • http://sspastudio.com/uploads/1/3/0/4/130435561/9493998.pdfIn PDF document text
    • http://shs1977.com/uploads/1/3/0/4/130475966/5938325.pdfIn PDF document text
    • http://antivirus.moraytreesurgeons.com/uploads/1/3/0/2/130289189/d53f3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00004a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7D 9352 bytes
SHA-256: 4c12e68f6d77d988b366984b41d0748a17718186170e9a1c64f333f0a0157f47
font_01_sfnt_off00006a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8F 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

Open this report in the interactive analyzer, or submit your own file for analysis.