Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ae725f883ae4fa…

MALICIOUS

PDF

55.9 KB Created: 2020-03-14 15:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 10215006b015953322be0b34fc2f8901 SHA-1: 60108bb728065c4415281577b2fdfed824fddc11 SHA-256: 11ae725f883ae4fa71a6158dd42ab5acf7d7aa3ca2c6bde2a73047a11a5f7731
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, indicating it functions as a link farm. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to a multitude of external sites. While no scripts were explicitly extracted, the presence of numerous links points towards a phishing or malware distribution scheme.

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://tiantianboshishicai.br3h.com/uploads/1/3/0/9/130969363/130969363.html#public+health+policy+and+politics+pdf
    • http://mandalasail.com/uploads/1/3/0/9/130969709/xikogi_babokigepi_lifumaf_bipej.pdf
    • http://helpinghandsofms.com/uploads/1/3/0/4/130476010/jepefopadala-sobekevifuwawow-divisakaru.pdf
    • http://mta-sts.mail.1stoplocksmiths.com/uploads/1/3/0/6/130604441/db278cb7c3e.pdf
    • http://womankine.com/uploads/1/3/0/3/130313748/fusugo.pdf
    • http://cpanel.alyssafamoso.com/uploads/1/3/0/5/130550750/1d36c8aa.pdf
    • http://tortugamobile.com/uploads/1/3/0/5/130590458/zotatuninizigi_dagoge_sageneleso_dobitavagob.pdf
    • http://www.jaigilchrist.com/uploads/1/3/0/4/130435544/5963329.pdf
    • http://giresungiyim.com/uploads/1/3/0/5/130543985/xirokawixabix.pdf
    • http://www.nnmedia.co.uk/uploads/1/3/0/6/130622011/pekojaravanimu_rorotepakux_zowodenoda.pdf
    • http://internetarchitect.net/uploads/1/3/0/5/130588822/tujofojuwizos.pdf
    • http://devcaribe.com/uploads/1/3/0/6/130603943/gepetebare.pdf
    • http://domainspremier.net/uploads/1/3/0/6/130639906/63ad3c920f.pdf
    • http://www.contactmts.com/uploads/1/3/0/6/130639396/65ac47a8f8b.pdf
    • http://dewynns.com/uploads/1/3/0/6/130621626/2274436.pdf
    • http://stemedacademy.com/uploads/1/3/0/2/130270895/wokunimokiwuxupeko.pdf
    • http://stlouistriathlon.com/uploads/1/3/0/6/130620366/a27d6d950.pdf
    • http://butterflykissescrafts.com/uploads/1/3/0/3/130313180/8726554.pdf
    • http://oscarsterte.com/uploads/1/3/0/2/130288567/kuxudakimekejufo.pdf
    • http://nekimastrategies.com/uploads/1/3/0/2/130289653/864469.pdf
    • http://866137906988101267.com/uploads/1/3/0/8/130874601/5c0675e11e8ca40.pdf
    • http://www.jarrodknight.com/uploads/1/3/0/2/130272977/mobizopavani_pajogozadeli.pdf
    • http://mail.firstbaptistmariposa.com/uploads/1/3/0/2/130288447/8761240.pdf
    • http://mooandmumpy.com/uploads/1/3/0/7/130738751/xabelupodowenik.pdf
    • http://wernickesfoundation.org/uploads/1/3/0/6/130620880/lajilini.pdf
    • http://mobilemechanicdagenham.com/uploads/1/3/0/5/130550663/zimutej.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b219.bin
abac1e7c230b3fafcf6ff40dd953848bea5a22768fd8079d23cca04f49423f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB219 7920 bytes

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