Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44fc14e886f3852…

MALICIOUS

PDF

43.7 KB Created: 2020-05-15 11:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b504f144ebb4416bfb8b2c4ca1152b24 SHA-1: 46cc60797f4dc80cb09eec26bf3aee7cd33970b4 SHA-256: a44fc14e886f3852cc1972e8181fde6041e0c139fc8caa7a98ed5e2e8d4da1a8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various PDF files hosted on different domains, likely intended to distribute further malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://wkndvan.life/uploads/1/3/0/8/130814397/130814397.html#freeport+fluke+fishing+report PDF link annotation
    • http://bowlingac.com/uploads/1/3/0/2/130289496/zupusa.pdfIn PDF document text
    • http://ajochinger.org/uploads/1/3/1/4/131437317/cfd2aa13a8.pdfIn PDF document text
    • http://gideertech.com/uploads/1/3/0/4/130488779/c37920.pdfIn PDF document text
    • http://thequickenloanspartnership.com/uploads/1/3/1/3/131381946/gagiwifofe_miwenafur.pdfIn PDF document text
    • http://jubilateworship.com/uploads/1/3/0/8/130873983/71e3b511.pdfIn PDF document text
    • http://bladelifeextender.com/uploads/1/3/0/2/130287815/fccc8b9a.pdfIn PDF document text
    • http://foundations-europe.de/uploads/1/3/0/4/130435666/fafozejosarerukemi.pdfIn PDF document text
    • http://aecnwa.com/uploads/1/3/1/6/131636698/vajesavozilimofa.pdfIn PDF document text
    • http://cinescapedynamics.net/uploads/1/3/0/5/130543353/lewijejatis-momofisalana-fofexamipevuvis-verudatelek.pdfIn PDF document text
    • http://lagodelrey.com/uploads/1/3/1/4/131407281/8d999adf7.pdfIn PDF document text
    • http://citygatecorp.com/uploads/1/3/0/3/130313113/kadabavijirin_refawuxuvalasuj_kuvega_mogibufe.pdfIn PDF document text
    • http://vipercomputerservice.com/uploads/1/3/1/4/131454383/9197769.pdfIn PDF document text
    • http://theartprojectjc.com/uploads/1/3/1/4/131454492/9143289.pdfIn PDF document text
    • http://quant-insights.com/uploads/1/3/0/5/130551229/wevuwara.pdfIn PDF document text
    • http://ccprofessionaltaxservices.net/uploads/1/3/0/7/130740265/3542017.pdfIn PDF document text
    • http://turtlebaycommunity.com/uploads/1/3/0/8/130814133/bebaja.pdfIn PDF document text
    • http://eureka.rocks/uploads/1/3/0/6/130603860/gasozajikobu.pdfIn PDF document text
    • http://carsonalliance.com/uploads/1/3/0/3/130313445/mipobireki_xilale_kujukikurak_domaxanimemef.pdfIn PDF document text
    • http://clutterandcharm.com/uploads/1/3/0/5/130545421/baa1c39a46c09.pdfIn PDF document text
    • http://fairyhairwear.com/uploads/1/3/0/6/130620690/viguvojev-vusageduzezowov-jusep-sojukaf.pdfIn PDF document text
    • http://fromtheheartliving.com/uploads/1/3/1/3/131379031/belizera-mogoguw-ronusesog-livepebazijuk.pdfIn PDF document text
    • http://megavalleymc.org/uploads/1/3/0/2/130270872/sopixoz_woletidafomu_xufevovozalip_jemizoji.pdfIn PDF document text
    • http://ontheballdogtrainingnj.net/uploads/1/3/0/2/130291029/piferofafuw-fasixazeloses.pdfIn PDF document text
    • http://biggdoggexpress.org/uploads/1/3/1/3/131384605/c7a42.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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_off00006900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 10236 bytes
SHA-256: b649bdf688ee0ee9e0affba3852983b327cf4bfe1bb497d74125e55293918205
font_01_sfnt_off00008c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 16676 bytes
SHA-256: 8b4fa00e00e2a0ee8d85bca6457fc2559292ad50824e41c4b10acb6064603e30

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