Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4ccd0cd53b6be4…

MALICIOUS

PDF

40.5 KB Created: 2020-03-08 06:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: aea28c9abc2d3394fd722b55ac39c961 SHA-1: d0ec0f37d1242ead0c27eed5b8188a6f1efd9a3d SHA-256: ed4ccd0cd53b6be430aa74d98fb45b5d84b7b19829d59cff91775bb90c085611
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to other PDF files on various domains. This behavior is indicative of a link farm or a distribution mechanism for malicious content. The heuristic PDF_SEO_LINK_FARM specifically flags this pattern. The document body, though heavily obfuscated, contains text related to 'Building electrical systems design', suggesting a lure to disguise 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://www.devonprivatechef.com/uploads/1/3/0/6/130604981/130604981.html#building+electrical+systems+design+ PDF link annotation
    • http://mail.wintermoonsummersun.com/uploads/1/3/0/7/130775364/5956701.pdfIn PDF document text
    • http://onlinerentpayments.com/uploads/1/3/0/7/130776123/rukifoka.pdfIn PDF document text
    • http://ronsmobilecarwashdetailing.com/uploads/1/3/0/5/130544321/xijumawodetevituku.pdfIn PDF document text
    • http://4hwesternheritageproject.com/uploads/1/3/0/7/130775518/3b03d48ba5c84f.pdfIn PDF document text
    • http://ayurvanna.com/uploads/1/3/0/6/130621072/jupagomimin-pavugorufef.pdfIn PDF document text
    • http://wavesmediagroup.com/uploads/1/3/0/5/130551187/9427389.pdfIn PDF document text
    • http://donaldwells.com/uploads/1/3/0/2/130289395/vetizudijulug.pdfIn PDF document text
    • http://sanchespack.com/uploads/1/3/0/8/130873828/0d10b71fad7b.pdfIn PDF document text
    • http://www.gunblogs.net/uploads/1/3/0/4/130436288/viveperewilusixorov.pdfIn PDF document text
    • http://capelli-salon-academy.com/uploads/1/3/0/6/130621812/9bd9ad3e94b.pdfIn PDF document text
    • http://aandeapothecary.com/uploads/1/3/0/8/130815080/gokeda.pdfIn PDF document text
    • http://elizabethagilbert.com/uploads/1/3/0/3/130323384/leburipowa-vogirexa-xasowafakijuf-kuxolefiziludu.pdfIn PDF document text
    • http://bandonplayhouse.com/uploads/1/3/0/2/130291971/sasadevi.pdfIn PDF document text
    • http://gsquarecommunications.com/uploads/1/3/0/8/130813306/4b89fc3d9709e.pdfIn PDF document text
    • http://www.dryamano.com/uploads/1/3/0/7/130739682/2debf81c296e11f.pdfIn PDF document text
    • http://mta-sts.mail2.maritimervadventures.com/uploads/1/3/0/7/130739533/4a22e.pdfIn PDF document text
    • http://agnarfoodrun.com/uploads/1/3/0/4/130488885/b0b6f.pdfIn PDF document text
    • http://gajon.info/uploads/1/3/0/5/130551086/fakopelesuxavu-gosasa-lopej.pdfIn PDF document text
    • http://marcuslaster.com/uploads/1/3/0/2/130289530/a870e302c1.pdfIn PDF document text
    • http://carrollcountydentistry.com/uploads/1/3/0/7/130776811/8946197.pdfIn PDF document text
    • http://www.vetahoops.com/uploads/1/3/0/5/130543154/2231429.pdfIn PDF document text
    • http://bryncurtjameshammond.com/uploads/1/3/0/5/130589366/kogod_sexidadi_jebowedat_virojugeba.pdfIn PDF document text
    • http://arcosflooringcontracts.com/uploads/1/3/0/6/130620290/bixelenikepa.pdfIn PDF document text
    • http://northeastbathrooms.co.uk/uploads/1/3/0/7/130775545/a8fae218abb.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 2

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_off000074da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DA 8264 bytes
SHA-256: b0fb922965eb89b312c00022a4f748147e38ee1367712f2b21a394b461e5db8e

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