Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c670dd091180489…

MALICIOUS

PDF

71.0 KB Created: 2020-04-01 12:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 94f39f966a8faaa608b994c8a043b598 SHA-1: 0a8462cbc8cf7c80bf6547ce4db0205f24d97031 SHA-256: 3c670dd0911804893bda10a005f535deb674f7dc5ed817a1fc022378d6e342f9
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO spam or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating the document is part of a link farm. The embedded URLs point to various domains, suggesting a broad distribution effort. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

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://foodclothingshelterart.com/uploads/1/3/0/7/130776088/130776088.html#cuentos+cortos+para+aprender+a+leer+en+ingles PDF link annotation
    • http://books.hanshi.com/uploads/1/3/1/4/131408159/bomitiviliruninas.pdfIn PDF document text
    • http://clarionchristianschool.com/uploads/1/3/0/5/130550758/7908562.pdfIn PDF document text
    • http://www.dinoscoresheet.com/uploads/1/3/1/1/131163920/sesexak_biduserututu_kagiteloluju_tojofabal.pdfIn PDF document text
    • http://skipandgive.org/uploads/1/3/0/2/130287445/bufukamofoban.pdfIn PDF document text
    • http://njetd.com/uploads/1/3/0/8/130814402/c0b8d5cdf1531.pdfIn PDF document text
    • http://foodhubonline.com/uploads/1/3/0/4/130483909/8723506.pdfIn PDF document text
    • http://homeshalfway.org/uploads/1/3/0/8/130814101/vetotabami.pdfIn PDF document text
    • http://drummer.bg/uploads/1/3/0/5/130551611/130673b72.pdfIn PDF document text
    • http://dailykihon.com/uploads/1/3/0/7/130776525/8047bb1.pdfIn PDF document text
    • http://foundationofluv.com/uploads/1/3/0/6/130639655/1904c9c3d3f3806.pdfIn PDF document text
    • http://gmcentertainmentltd.com/uploads/1/3/0/6/130605433/fc1a76310d16.pdfIn PDF document text
    • http://nuovaedilart.it/uploads/1/3/0/6/130603789/pujixavo_zuligokofukasid_rirewanufarem_pimudeb.pdfIn PDF document text
    • http://amelialeighharris.com/uploads/1/3/0/6/130604715/rexem.pdfIn PDF document text
    • http://artbyyouatweirdgirlcreations.com/uploads/1/3/0/6/130621393/b0c566de.pdfIn PDF document text
    • http://andreassuter.com/uploads/1/3/0/6/130622005/5ead3092e95580.pdfIn PDF document text
    • http://401kspot.com/uploads/1/3/0/5/130550778/zifugejugelatejon.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_off0000d604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD604 8924 bytes
SHA-256: 6b75dec9a78400161ef7278d631eac540d192ca92aa78b2753a933fc5ba6c17b
font_01_sfnt_off0000f6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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