Malicious PDF — malware analysis report

Static analysis result for SHA-256 3970bf170a74bd02…

MALICIOUS

PDF

52.5 KB Created: 2020-04-02 12:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: aaf0074a9ed480838e57c465733b868b SHA-1: 3cad769195f5b821b7926a7a326d357e0fd5b23e SHA-256: 3970bf170a74bd0204ffd6d6efc298c7f22c5541d366fddc87e98f3110f24018
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to other PDF files hosted on various domains. This pattern is indicative of a link farm or a phishing campaign designed to distribute malicious content or redirect users to fraudulent sites. The ML classifier strongly supports the malicious nature of this PDF. 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://alrabieaalarabi.net/uploads/1/3/1/0/131070805/131070805.html#que+es+un+red+de+computadoras PDF link annotation
    • http://lydlydcastorena.com/uploads/1/3/1/4/131407944/ea8e83996b.pdfIn PDF document text
    • http://rechargedxb.com/uploads/1/3/0/6/130604855/72ccc9294.pdfIn PDF document text
    • http://bushbuckriverhouse.com/uploads/1/3/0/8/130813055/tulelivovibapaf_pewafubafit_mawosasopom.pdfIn PDF document text
    • http://barbaraabati.com/uploads/1/3/0/4/130435737/1868614.pdfIn PDF document text
    • http://joanproudmanart.com/uploads/1/3/0/6/130639782/pusipedotaga_zerufew.pdfIn PDF document text
    • http://lovelycaroline.net/uploads/1/3/0/6/130621068/1738596.pdfIn PDF document text
    • http://econogreen.org/uploads/1/3/0/4/130475981/zefejuxadi_wuvesobelavo_wujitow_mitebunezop.pdfIn PDF document text
    • http://campisicustoms.com/uploads/1/3/0/6/130604165/131625.pdfIn PDF document text
    • http://aloveoftennis.ca/uploads/1/3/0/6/130605433/zovopu.pdfIn PDF document text
    • http://ahmedaliaref.com/uploads/1/3/0/3/130313718/zemosuv.pdfIn PDF document text
    • http://floridasilverfoxes.com/uploads/1/3/0/3/130379380/7720356.pdfIn PDF document text
    • http://thenewdope.com/uploads/1/3/0/2/130288455/790156.pdfIn PDF document text
    • http://layanshaheen.com/uploads/1/3/0/5/130542953/jomutakavomu.pdfIn PDF document text
    • http://electrotech.vip/uploads/1/3/0/7/130740368/didivabafiw.pdfIn PDF document text
    • http://willellastock.com/uploads/1/3/1/0/131070767/35e42c7256.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 2

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_off0000904a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904A 8636 bytes
SHA-256: 15f0c94a14297e4a41020bcd23c02ec535b5265a355f929b4d478e22fa062e64
font_01_sfnt_off0000afc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC7 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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