Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92dfb70d77a8bb8…

MALICIOUS

PDF

39.5 KB Created: 2020-04-02 20:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 65cafa117336fe7b1cf79d6f580e40f8 SHA-1: 455246c257315c9b8474ff9614ebf6bbf50c4f9c SHA-256: c92dfb70d77a8bb862b86b8a97bad39a9b7bbefe9a133b4dbc564af770b6ef9f
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF SEO link farm. This technique is often used to distribute malicious content or to manipulate search engine results. The document body itself is largely unreadable, but the presence of numerous external URLs suggests a delivery mechanism for further malicious activity. No scripts were extracted from this sample.

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://robrikertraining.com/uploads/1/3/0/6/130621283/130621283.html#sketch+by+carl+sandburg PDF link annotation
    • http://thegaragenottingham.com/uploads/1/3/0/2/130271049/289a4828b23de2.pdfIn PDF document text
    • http://driving-school.us/uploads/1/3/1/3/131383333/866dc.pdfIn PDF document text
    • http://welch18.com/uploads/1/3/1/3/131398591/maludowolojox.pdfIn PDF document text
    • http://pattersonwoodworking.com/uploads/1/3/1/3/131383614/8170392.pdfIn PDF document text
    • http://cpanel.damascusbaptistchurch.org/uploads/1/3/0/7/130740251/fbd914c35b815eb.pdfIn PDF document text
    • http://shiprockinstitute.com/uploads/1/3/0/4/130476417/nibokakofagif-nutapovamuwul-kemorawa.pdfIn PDF document text
    • http://lastritesmusic.com/uploads/1/3/0/6/130604615/madoge_tudebosulubij_fexamosox_gebenunog.pdfIn PDF document text
    • http://reptilepod.com/uploads/1/3/0/3/130323092/58ed64eafe.pdfIn PDF document text
    • http://leadingedgeflightschool.com/uploads/1/3/0/6/130620852/d590865fe3cf.pdfIn PDF document text
    • http://dontbeaquitter.com/uploads/1/3/0/9/130969297/palaxuwasefutizif.pdfIn PDF document text
    • http://vittoriomacchi.com/uploads/1/3/0/3/130324340/valogapipodezojivini.pdfIn PDF document text
    • http://michifuzz.org/uploads/1/3/0/4/130476168/zimap.pdfIn PDF document text
    • http://onthemovetherapy.com/uploads/1/3/0/2/130287894/78a33796.pdfIn PDF document text
    • http://vanishingloan.com/uploads/1/3/0/9/130969904/zemuvenek_zolezamuno.pdfIn PDF document text
    • http://callusedhands.com/uploads/1/3/0/5/130550787/rapovamik-bopobuxajig.pdfIn PDF document text
    • http://farishtrust.org/uploads/1/3/0/9/130969002/leponeduxasolus.pdfIn PDF document text
    • http://rgvdoula.com/uploads/1/3/0/2/130272072/ad91df.pdfIn PDF document text
    • http://grundycfb.com/uploads/1/3/0/2/130289754/vonototujegebitojove.pdfIn PDF document text
    • http://mysticalrockny.com/uploads/1/3/1/3/131384018/gopidukabawubutixam.pdfIn PDF document text
    • http://erinandchadmarshall.com/uploads/1/3/0/6/130639800/3096544.pdfIn PDF document text
    • http://pharaba.com/uploads/1/3/0/5/130588560/dibugiguzazopu.pdfIn PDF document text
    • http://papasidou.com/uploads/1/3/1/3/131398567/c122d4bef5.pdfIn PDF document text
    • http://farmersinthedeli.com/uploads/1/3/0/7/130739038/3946605.pdfIn PDF document text
    • http://fuelandmove.com/uploads/1/3/0/9/130969522/4026007.pdfIn PDF document text
    • http://mytipsytaboo.com/uploads/1/3/1/0/131069859/8380520.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: callusedhands.com 4 samples

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_off0000724c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724C 7720 bytes
SHA-256: f4de61e79d79ab6456f11bbb0774c86d7e30851e4ad0b63a17c7792cf47e9a03

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