Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbc1fdb46b4583d…

MALICIOUS

PDF

47.3 KB Created: 2020-03-29 02:38:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6ba7a6ca5b9c4c4738681934c8e3fd68 SHA-1: 8daf8afac1a4063603bed9b6bea4a94826c71759 SHA-256: 4cbc1fdb46b4583d93153c339bc9de13d5c2659a0965b28dd7f2b4a5b9074525
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, contains a URL that also points to an external HTML resource. This suggests the primary function of this PDF is to act as a link farm, directing users to numerous other PDF files hosted across various domains, likely for SEO manipulation or to distribute additional malicious content.

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://cyclebavaria.com/uploads/1/3/1/3/131398544/131398544.html#operaciones+con+numeros+decimales+quinto+de+primaria PDF link annotation
    • http://novomancy.net/uploads/1/3/0/6/130620340/wawojiwiwetorojafido.pdfIn PDF document text
    • http://irvingconsultinggroup.org/uploads/1/3/0/6/130621818/6b202.pdfIn PDF document text
    • http://neighborlyequestrian.com/uploads/1/3/0/4/130476502/gezepumuvovomo.pdfIn PDF document text
    • http://www.gratitudetravels.net/uploads/1/3/0/4/130489467/d32c2aa326.pdfIn PDF document text
    • http://www.trueissuesoftheheart.com/uploads/1/3/0/5/130539235/7ac02167e.pdfIn PDF document text
    • http://blushlaboutique.com/uploads/1/3/0/9/130969247/risonamixine_durinag_ruwixejotenaw.pdfIn PDF document text
    • http://juarezanabel.com/uploads/1/3/1/0/131070167/57935.pdfIn PDF document text
    • http://muchacomida.org/uploads/1/3/0/2/130270904/8725254.pdfIn PDF document text
    • http://skiappartement-saintgervais.com/uploads/1/3/0/8/130874030/ee3a33ac55dc7.pdfIn PDF document text
    • http://enchantedroseflowerlamp.com/uploads/1/3/0/5/130590548/1397789.pdfIn PDF document text
    • http://pattern-miner.com/uploads/1/3/0/5/130543386/keraze.pdfIn PDF document text
    • http://74-123-72-165.mgwnet.com/uploads/1/3/0/8/130874091/7440bc4153a6.pdfIn PDF document text
    • http://iamcollegiate.com/uploads/1/3/0/7/130738946/d916c30b.pdfIn PDF document text
    • http://boyceneilcarter.com/uploads/1/3/0/6/130621185/543789.pdfIn PDF document text
    • http://toss.social/uploads/1/3/0/3/130313388/d5508706.pdfIn PDF document text
    • http://renovareinstitute.net/uploads/1/3/0/9/130969750/4009366.pdfIn PDF document text
    • http://www.support.rodhillportraits.com/uploads/1/3/0/7/130739783/xopifizebudokusu.pdfIn PDF document text
    • http://www.plvacuum.uk/uploads/1/3/0/9/130969664/b12edd5.pdfIn PDF document text
    • http://packer-products.com/uploads/1/3/0/3/130323253/2420662.pdfIn PDF document text
    • http://thecottonshops.com/uploads/1/3/0/7/130739962/0a35ed2910ded72.pdfIn PDF document text
    • http://milwaukeepestpros.com/uploads/1/3/1/0/131070866/xawiginik.pdfIn PDF document text
    • http://www.patriotssupportingtracywarriors.org/uploads/1/3/0/4/130476152/1696657.pdfIn PDF document text
    • http://www.olympusvillas.com/uploads/1/3/0/4/130489342/ratebotuvikixorerek.pdfIn PDF document text
    • http://highway.uno/uploads/1/3/0/4/130476684/1ca31ccc86.pdfIn PDF document text
    • http://levanto.surf/uploads/1/3/0/3/130313376/6142828.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
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7690 9184 bytes
SHA-256: b0526331eead2402de61001fd71960c681606a6caa08542be3b6043d3b55f296
font_01_sfnt_off0000978e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978E 16124 bytes
SHA-256: 99c5a563bd14079918bfffdbdfd95054cabbef0c47e0e3eb61f716c3cd559389

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