Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19f7c85fcbfd155…

MALICIOUS

PDF

43.8 KB Created: 2020-03-29 14:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: c2173526ff15740e2a06a211e85ba653 SHA-1: d07d2e11e76afc3e61a39f4ed932278f7e18c21c SHA-256: f19f7c85fcbfd155a6eec905b3d1c08eda9140f4f823aa37cc1576646daf609b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine results or lure victims. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document explicitly requests sensitive recovery information, such as private keys or backup codes. This combination strongly suggests a phishing or credential harvesting attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ms-j.org/uploads/1/3/1/4/131406063/131406063.html#putty+que+son PDF link annotation
    • http://peterberg.us/uploads/1/3/0/6/130621713/rulumojesit.pdfIn PDF document text
    • http://travel-taste-explore.com/uploads/1/3/0/6/130640227/gebes.pdfIn PDF document text
    • http://codingskills.com.au/uploads/1/3/0/7/130739363/213362.pdfIn PDF document text
    • http://3dbybill.com/uploads/1/3/0/7/130739910/vubuwaweg_ziwavusabar.pdfIn PDF document text
    • http://info-max.ca/uploads/1/3/0/6/130604501/binegejuwidom-rubenizuxa-navexume-sajirakul.pdfIn PDF document text
    • http://matsuitc.com/uploads/1/3/0/4/130483902/a0004de8.pdfIn PDF document text
    • http://stevessongs.com/uploads/1/3/0/4/130483576/sedekibol_duzudos.pdfIn PDF document text
    • http://swampersoriginal.com/uploads/1/3/0/6/130639045/76f3bbf8098f54.pdfIn PDF document text
    • http://mckinneynewsnow.com/uploads/1/3/0/5/130588257/156992.pdfIn PDF document text
    • http://theloveshanghai.com/uploads/1/3/0/8/130814407/7822600.pdfIn PDF document text
    • http://cae-tikao.com/uploads/1/3/0/5/130589400/sadejukojixoga.pdfIn PDF document text
    • http://snapfreshsolutions.com/uploads/1/3/0/7/130776066/wikiporonovad.pdfIn PDF document text
    • http://sigillab.com/uploads/1/3/0/5/130550818/pafumesol.pdfIn PDF document text
    • http://azucarelpaso.com/uploads/1/3/0/8/130873710/8ce54.pdfIn PDF document text
    • http://rcjindia.in/uploads/1/3/0/8/130814874/f56857.pdfIn PDF document text
    • http://ourcommunitysalutesfortbend.org/uploads/1/3/0/4/130483980/buruvedadefed_lewuraxu_ginowotafu.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: brhrealestatemarketing.com 7 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_off00008203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8203 8912 bytes
SHA-256: fc14b4d28c941137de4a18cd9571016be39c5c475bdc60b60edbd5513b69dbe5

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