Malicious PDF — malware analysis report

Static analysis result for SHA-256 4496a651aacc78fa…

MALICIOUS

PDF

43.4 KB Created: 2020-04-03 09:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 65f1d42b2a7095c7691021875626da67 SHA-1: 5bbd0af1c113f0d90223d3ec38202e0857cf5355 SHA-256: 4496a651aacc78fadbdd85fe23abcfb313a1c05abe645685c68ac421fd0559e3
104 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to other PDF files, indicative of a link farm or SEO poisoning technique. The presence of a 'download button' lure further suggests an attempt to trick the user into clicking malicious links. The primary URL http://lumiereweddingphotography.com/uploads/1/3/0/8/130874023/130874023.html#root+htc+desire+626g+plus likely serves as the entry point for this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lumiereweddingphotography.com/uploads/1/3/0/8/130874023/130874023.html#root+htc+desire+626g+plus PDF link annotation
    • http://tholmesphotography.com/uploads/1/3/0/6/130620454/4344814.pdfIn PDF document text
    • http://maddywoodman.com/uploads/1/3/0/6/130621436/610100e7ba9957.pdfIn PDF document text
    • http://dmvengineering.net/uploads/1/3/0/2/130271001/pufunugepugifakij.pdfIn PDF document text
    • http://comicsandcognac.com/uploads/1/3/0/8/130813829/tenuwitokariw.pdfIn PDF document text
    • http://muskegonapostolic.net/uploads/1/3/0/5/130550854/8218475.pdfIn PDF document text
    • http://strongbabefit.com/uploads/1/3/0/5/130551472/a675115e.pdfIn PDF document text
    • http://andreaottoart.com/uploads/1/3/0/9/130969001/wumured.pdfIn PDF document text
    • http://metamobilerepairandservice.com/uploads/1/3/0/9/130969183/vevekagiduwolesulo.pdfIn PDF document text
    • http://unmaskingthebiasphere.com/uploads/1/3/0/3/130324112/e252923635.pdfIn PDF document text
    • http://orionbandinstruments.com/uploads/1/3/1/0/131070342/8122488.pdfIn PDF document text
    • http://hillsliquor.com/uploads/1/3/0/6/130620681/5625977.pdfIn PDF document text
    • http://nvcr.info/uploads/1/3/0/2/130291766/6626693.pdfIn PDF document text
    • http://coloringtodecorate.com/uploads/1/3/0/7/130776304/260944.pdfIn PDF document text
    • http://esmeraldaramirez.com/uploads/1/3/1/0/131070447/foxubixere.pdfIn PDF document text
    • http://ehstowertimes.com/uploads/1/3/0/5/130588363/nomeveroxejilaba.pdfIn PDF document text
    • http://yardsalessource.com/uploads/1/3/0/6/130621026/a4ebd.pdfIn PDF document text
    • http://carstenwalker.com/uploads/1/3/0/5/130540882/a43557dc28d7.pdfIn PDF document text
    • http://jettiethissen.com/uploads/1/3/0/7/130775843/wunofuvegoka-tametiraburewas.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
🗂 Part of campaign: aceintheholeentertainment.com 5 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000730c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730C 8692 bytes
SHA-256: 402070c270b21a80b17a9e76f85a2a1d103e2adccfafbcc7dd335759df047705
font_01_sfnt_off00009440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9440 2860 bytes
SHA-256: 7197acd5be3ca928bf2fddcf271675287fe5d8a29889eb1f75ec5705dd6bc071