Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97a92f80e9b72d1…

MALICIOUS

PDF

51.8 KB Created: 2020-04-01 15:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 59f3a31756c8e5a4585c1608c9fd26de SHA-1: 7730b790c7ca13e92281df57213ac7ae18810bfc SHA-256: e97a92f80e9b72d1e8e114dd4ae79d9d8ddf5d445733790b47d3c62428be289c
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO spam campaign. The document body is heavily obfuscated and contains some of the same URLs, reinforcing the malicious intent. 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://ressortissantsnguiguiss.org/uploads/1/3/0/6/130639269/130639269.html#tipo+de+enlace+quimico+del+cloruro+de+potasio PDF link annotation
    • http://lienfruits.net/uploads/1/3/0/8/130874318/04eb7c.pdfIn PDF document text
    • http://tbsbyjmeon.com/uploads/1/3/0/9/130969458/visivegarujud_nogetubesadoku_kepemani.pdfIn PDF document text
    • http://alfredocarrizo.com/uploads/1/3/0/4/130435937/luxarunejusoruluvig.pdfIn PDF document text
    • http://swimleftlabs.com/uploads/1/3/0/6/130604550/1a023988.pdfIn PDF document text
    • http://toys4ucy.com/uploads/1/3/0/7/130740440/aaf61ce0c22.pdfIn PDF document text
    • http://replenishmysoul.com/uploads/1/3/0/5/130542936/a5a16.pdfIn PDF document text
    • http://wardogsremembered.org/uploads/1/3/0/3/130313741/juvefemapopoju.pdfIn PDF document text
    • http://stevierice.com/uploads/1/3/0/5/130589313/rupuzapujuxud.pdfIn PDF document text
    • http://faceup.guru/uploads/1/3/0/8/130814467/lemajotuwizoxurepi.pdfIn PDF document text
    • http://lfsporthorses.com/uploads/1/3/1/4/131453132/1474296.pdfIn PDF document text
    • http://movimientomexicano2018.org/uploads/1/3/0/3/130324206/2980113.pdfIn PDF document text
    • http://cheerfundamentals.com/uploads/1/3/0/5/130550915/gumexokujelem.pdfIn PDF document text
    • http://uwsc.eu/uploads/1/3/1/3/131380284/ranevidamawiniwo.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000880b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880B 2128 bytes
SHA-256: e33a8a9d3351a59a911094e68d721a4eacc2a1a42a9db86c2b77e0db23517267
font_01_sfnt_off0000915b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915B 9316 bytes
SHA-256: 3977d003de4a4baa4da9431d2fc3cba272c15ac93f9980892e8fd930502871c5
font_02_sfnt_off0000b272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB272 4144 bytes
SHA-256: 885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da

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