Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad54128dd7b2fa0…

MALICIOUS

PDF

49.7 KB Created: 2020-07-09 00:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3329c22e391775170aa4b69d09ae2795 SHA-1: 832ee27d5762e1e1b433aee50ffbe17f1ec4e554 SHA-256: bad54128dd7b2fa0aac260590269c8b0575c7777a102d8d43a16978a7679c7dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, indicating a phishing or malicious redirection attempt. The ML classifier strongly supports the malicious nature of this PDF. The primary attack pattern involves luring users to external sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.com/wb?keyword=manager%20leadership%20styles%20pdf
    • http://files.jaml.org/uploads/1/3/0/8/130814423/lolutinovetu-bokedebilakix-pemajaponidosa.pdf
    • http://files.crosstowncharityweek.org/uploads/1/3/2/7/132710782/7e6db4.pdf
    • http://files.cellularmaterials.net/uploads/1/3/0/9/130969154/wosadejufikapiz-zijadepasofodot.pdf
    • http://files.theorchidroom.net/uploads/1/3/0/7/130776370/bikeximezipajufawovi.pdf
    • http://files.seetheworld.tours/uploads/1/3/2/8/132815961/bawifutopite.pdf
    • http://files.mnnicebaseball.com/uploads/1/3/0/8/130813851/weteregu.pdf
    • http://files.lemonteilrevolution.com/uploads/1/3/1/0/131069812/kujuxorox_jisomonibetalu_dorokajuja.pdf
    • http://files.mnnicebaseball.com/uploads/1
    • https://wilewivim.files.wordpress.com/2020/06/votomabatozepow.pdf
    • https://vikukixiv.files.wordpress.com/2020/06/mivatewimobi.pdf
    • https://pobesamob.files.wordpress.com/2020/06/penuxe.pdf
    • https://lapujigop.files.wordpress.com/2020/07/viwopena.pdf
    • https://xusurubisi.files.wordpress.com/2020/07/3392812231.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086bc.bin
5591a147f685af91b88e09fe88ad16c0e77f6c830c9801575f28531868ac6891
pdf-font-stream PDF embedded font (sfnt) at offset 0x86BC 5088 bytes
font_01_sfnt_off000097fe.bin
537cd0405598fa9c4e8456532a07bae5c8bf073d4a6978ac6bf23dc6456eafa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x97FE 10088 bytes