Malicious PDF — malware analysis report

Static analysis result for SHA-256 889b46b0266b10f9…

MALICIOUS

PDF

67.1 KB Created: 2020-03-12 04:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6ff87b78717bd27c5c3ade6866a8a372 SHA-1: a5a408332107bf7df251c541250227a13de7b02c SHA-256: 889b46b0266b10f93e3c51566a6119044ccbb08b4148922aef94510aa0bd35a1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm designed to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further stages of an attack.

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://yghu17.bdgct.com/uploads/1/3/0/5/130550706/130550706.html#acetic+acid+methanol+carbonylation PDF link annotation
    • http://orlandoforeclosurelaw.net/uploads/1/3/0/5/130545249/e6018802e7a29ec.pdfIn PDF document text
    • http://gg.andreganz.de/uploads/1/3/0/5/130547812/2941581.pdfIn PDF document text
    • http://domainedelalbejot.fr/uploads/1/3/0/5/130588410/nafimebesezu.pdfIn PDF document text
    • http://srpjewelry.com/uploads/1/3/0/4/130436298/c0d4af6475.pdfIn PDF document text
    • http://msgray.org/uploads/1/3/0/2/130287896/sepozuwikusa.pdfIn PDF document text
    • http://nutritionrxllc.com/uploads/1/3/0/5/130551925/61858fa.pdfIn PDF document text
    • http://www.therobotsgarden.com/uploads/1/3/0/4/130483697/911046.pdfIn PDF document text
    • http://omahaventuregroup.org/uploads/1/3/0/7/130776100/fifavek-jedodemex-kalemafarazi-sotenadamajasi.pdfIn PDF document text
    • http://colo-horse.com/uploads/1/3/0/4/130491947/3452064.pdfIn PDF document text
    • http://jakebrenneise.net/uploads/1/3/0/4/130436239/mebejegopebuxevalaz.pdfIn PDF document text
    • http://shanghaishopper.com/uploads/1/3/0/2/130272282/kexexilomibadali.pdfIn PDF document text
    • http://riseatthelakeshore.com/uploads/1/3/0/6/130620981/bcc2c7d5a91be.pdfIn PDF document text
    • http://formerfdainspectors.com/uploads/1/3/0/5/130551049/xixez.pdfIn PDF document text
    • http://jinglejangle.life/uploads/1/3/0/3/130312913/busiloxidumir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECE 8692 bytes
SHA-256: 99a22c964cdfd83856bda6ed63269a9cadc46f965daf70b6bbd2e94a66ec89dd
font_01_sfnt_off0000dfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 2684 bytes
SHA-256: 8b292db283a0ef49a4a24478c14192a15b25ce9841f4f7b0b0b6b6b294ab5ea1
font_02_sfnt_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 16036 bytes
SHA-256: b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211

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