Malicious PDF — malware analysis report

Static analysis result for SHA-256 856e02268f5e859f…

MALICIOUS

PDF

37.9 KB Created: 2020-03-28 05:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 71ba161e1825572e8153f05b78079c2e SHA-1: 28b805191be34e9b88bae7ba2a2a02efb387287c SHA-256: 856e02268f5e859f80d58b803a62877be890da36f5dff646df4aaf4b458682a7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards an attempt to redirect users to potentially harmful content. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://batonrougeplumbinganddrain.com/uploads/1/3/0/8/130814471/130814471.html#troy+bilt+2700+psi+pressure+washer+pump+diagram PDF link annotation
    • http://onyxarcata.com/uploads/1/3/0/4/130476976/roguwiluv-wilabuvet-medakogivuzag.pdfIn PDF document text
    • http://ricebeansandh2o.com/uploads/1/3/0/3/130312971/gipideloboru_zenijejajew_nupupi_zarir.pdfIn PDF document text
    • http://achintconsultinginc.com/uploads/1/3/0/3/130323103/6511362.pdfIn PDF document text
    • http://econrefresh.co.uk/uploads/1/3/0/2/130288421/1103998.pdfIn PDF document text
    • http://tcncleanservice.com/uploads/1/3/0/6/130640059/nizatevotakurokizi.pdfIn PDF document text
    • http://bonvivantsdc.com/uploads/1/3/0/5/130543020/9df5df2704b4e.pdfIn PDF document text
    • http://johnnyraygibbsactor.com/uploads/1/3/0/7/130776458/jubava.pdfIn PDF document text
    • http://bluesprucebeeco.com/uploads/1/3/0/9/130969405/rajofofusor.pdfIn PDF document text
    • http://christinahankinsart.com/uploads/1/3/0/8/130873890/wuwikopobidivepo.pdfIn PDF document text
    • http://www.k-marieconsultant.com/uploads/1/3/0/4/130476006/97488c93d621fd.pdfIn PDF document text
    • http://mta-sts.mail.columbiapage.com/uploads/1/3/0/6/130620804/b7f3e06.pdfIn PDF document text
    • http://chicagonightlifepass.com/uploads/1/3/0/4/130483416/1872860.pdfIn PDF document text
    • http://appraisejewelry.net/uploads/1/3/0/7/130776291/kaxanu-wupomuwapeg-jibutojafidip-kevituzofe.pdfIn PDF document text
    • http://mail.e-s-network.com/uploads/1/3/0/2/130287957/7979609.pdfIn PDF document text
    • http://www.alkalinetwat.com/uploads/1/3/0/7/130740053/jitexefasuju.pdfIn PDF document text
    • http://www.bestinthewestmovers.com/uploads/1/3/0/7/130775232/423512.pdfIn PDF document text
    • http://ianwalkerlaw.com/uploads/1/3/0/5/130543761/c88c99546.pdfIn PDF document text
    • http://reconmetal.ca/uploads/1/3/0/7/130739498/9c874761ca.pdfIn PDF document text
    • http://eloraadventurecamp.com/uploads/1/3/0/5/130589276/6636050314e06.pdfIn PDF document text
    • http://ravens-creations.com/uploads/1/3/0/7/130738943/wepavetosilin-fesegisivabufum-penidopavav-zolevavi.pdfIn PDF document text
    • http://myladykarma.com/uploads/1/3/0/5/130538836/cdeb619.pdfIn PDF document text
    • http://warriorspath4veterans.org/uploads/1/3/0/5/130541552/0d51a6464c95.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 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_off000069c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 8312 bytes
SHA-256: 447f90846e06f7aefc64735364fb0a9df736a0b25e0cbed019b9da76e9498d04

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