Malicious PDF — malware analysis report

Static analysis result for SHA-256 39455fa824a3ebd7…

MALICIOUS

PDF

42.2 KB Created: 2020-03-21 21:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: aefd935e3ad00c4a357fcb6e1619f575 SHA-1: c71021614f750c4be38daf66016b3eee6e6ead7a SHA-256: 39455fa824a3ebd78780fe3f2582d1b786ecd5a194e811cd466afecf78130940
96 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a PDF link farm detector and an ML classifier. The document contains a large number of external URLs pointing to PDF files hosted on various domains. The primary attack pattern appears to be a link farm designed to manipulate search engine results or to distribute additional malicious content through these linked PDFs. No scripts were extracted, and the document body is heavily obfuscated.

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://saranlpcoach.com/uploads/1/3/0/4/130483710/130483710.html#nombres+propios+lugares+y+personas PDF link annotation
    • http://www.tiny-warriors.com/uploads/1/3/0/7/130776698/sofiboxusuped_pawulinafiza_dipusat_fimusatupon.pdfIn PDF document text
    • http://rawblends.com/uploads/1/3/0/6/130605107/3008995.pdfIn PDF document text
    • http://www.theoilvibeevents.com/uploads/1/3/0/6/130639437/mubuvadanoduzoris.pdfIn PDF document text
    • http://bonobovitality.com/uploads/1/3/0/7/130738700/1147556.pdfIn PDF document text
    • http://thebelieversoutlet.com/uploads/1/3/0/6/130620813/5280545.pdfIn PDF document text
    • http://www.jakeandgigi.net/uploads/1/3/0/8/130814769/dixoz.pdfIn PDF document text
    • http://www.schwabelfab.net/uploads/1/3/0/7/130775659/1867485.pdfIn PDF document text
    • http://www.jimreckardphotgraphy.com/uploads/1/3/0/7/130776533/piwez.pdfIn PDF document text
    • http://www.austinapartmentsexpress.com/uploads/1/3/0/8/130874316/973466b6.pdfIn PDF document text
    • http://www.processusgagnant.ch/uploads/1/3/0/6/130639790/195de2e585.pdfIn PDF document text
    • http://hostmaster.celticmistminiaturehorses.com/uploads/1/3/0/5/130588570/jukig_tixerawitebesup.pdfIn PDF document text
    • http://dalotyn.store/uploads/1/3/0/2/130287281/1974099.pdfIn PDF document text
    • http://hostmaster.jnrbuilding.com/uploads/1/3/0/6/130639241/luxigomarujonor_rilujofuraz.pdfIn PDF document text
    • http://www.lunzonline.com/uploads/1/3/0/2/130270889/1950156.pdfIn PDF document text
    • http://masturnation.net/uploads/1/3/0/6/130639861/e1de6fb54.pdfIn PDF document text
    • http://raiseyouruxiq.com/uploads/1/3/0/4/130476200/5552223.pdfIn PDF document text
    • http://chinahornensemble.com/uploads/1/3/0/4/130488241/vufel.pdfIn PDF document text
    • http://www.plantfairs.com/uploads/1/3/0/5/130544584/jijupobip.pdfIn PDF document text
    • http://commerce-runningabusinessunit.com/uploads/1/3/0/6/130604903/095403d.pdfIn PDF document text
    • http://www.carolinahomebargain.com/uploads/1/3/0/7/130740169/f4dae9da11dc.pdfIn PDF document text
    • http://mombligation.net/uploads/1/3/0/8/130874252/1299052.pdfIn PDF document text
    • http://my.trssociety.ca/uploads/1/3/0/4/130476150/de4869f38.pdfIn PDF document text
    • http://cueponi.org/uploads/1/3/0/4/130488195/dedixatokomutana.pdfIn PDF document text
    • http://bebefoodie.ca/uploads/1/3/0/3/130379105/d7ff17b5.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7868 9192 bytes
SHA-256: 924b2cfb39f9c65e14b5c51b92f3c35dafeab383b5aac1a8bb4af80cce000e38

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