Malicious PDF — malware analysis report

Static analysis result for SHA-256 3878dff4e516dd86…

MALICIOUS

PDF

42.8 KB Created: 2020-04-06 05:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: db642a4831319bc4bd7c2c6eaecfe06a SHA-1: 5b4f9375411bc8aafd9989b9aecf983440a1202d SHA-256: 3878dff4e516dd8672e3cc5db3cc9ee39b8dcf7a42c2167e05469e85f5d5df6e
136 Risk Score

Malware Insights

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

The PDF document is designed as a lure, masquerading as a 'Honeywell thermostat setup guide' to entice users. It contains a significant number of embedded external links, many pointing to other PDF files, indicative of a link farm or redirection scheme. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic where users are prompted for a password to access an archive, likely to bypass initial security scans. The primary intent appears to be directing users to a network of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://avidaenglish.com/uploads/1/3/0/3/130313241/130313241.html#honeywell+thermostat+setup+guide PDF link annotation
    • http://bifemecanico.com/uploads/1/3/0/5/130590153/2452363.pdfIn PDF document text
    • http://hhroy.com/uploads/1/3/0/6/130639994/4ccc4de332f.pdfIn PDF document text
    • http://roxinstallations.com/uploads/1/3/1/3/131380094/3404398.pdfIn PDF document text
    • http://linetendelivery.com/uploads/1/3/0/4/130435941/jitokepazazapoz.pdfIn PDF document text
    • http://breastcare.studio/uploads/1/3/0/4/130488812/madigudex_taxagavapa_fujusoletixale.pdfIn PDF document text
    • http://ryanhuff.net/uploads/1/3/0/4/130488165/d4de181c95.pdfIn PDF document text
    • http://tulsaeats.com/uploads/1/3/1/4/131409074/a2555654bb9de5.pdfIn PDF document text
    • http://mickbull.biz/uploads/1/3/0/4/130483799/13b1a2f.pdfIn PDF document text
    • http://thehealthwitch.com/uploads/1/3/0/2/130270792/tedoririlotirumiku.pdfIn PDF document text
    • http://innovatorsasylum.com/uploads/1/3/0/6/130621367/lakog-pubogogizedisi-nogoxitudoxedon-rasofudesuv.pdfIn PDF document text
    • http://safenightsguardianangels.com/uploads/1/3/0/8/130874067/9df5caa6e8d6e.pdfIn PDF document text
    • http://chandraquel.com/uploads/1/3/1/3/131381021/kojunawimomo.pdfIn PDF document text
    • http://bettyleetreasures.shop/uploads/1/3/1/4/131406717/7f6b14a.pdfIn PDF document text
    • http://alexisreyesmua.com/uploads/1/3/0/7/130739152/4497368.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
    • 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_off00006a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 7668 bytes
SHA-256: af5eda42a8fbdbbe89f68cc3368c0ff4e068c4fca107113f10473d84838d92bc
font_01_sfnt_off00008844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8844 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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