Malicious PDF — malware analysis report

Static analysis result for SHA-256 4699d7daa101d13d…

MALICIOUS

PDF

58.2 KB Created: 2020-08-07 23:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210b7ddbe15cd7c2a432ef350d181e31 SHA-1: 710e33a95cde056b7b43797ddb46ecdafbed8516 SHA-256: 4699d7daa101d13dacf980bedc56d459ea8849907f046cd5bad7f91181b75270
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text referencing an 'Aadhaar update form', suggesting a phishing lure. The presence of a malicious redirector and a link farm indicates an attempt to drive traffic to potentially malicious sites.

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/pify?keyword=aadhaar+update+form+kannada+pdf
    • http://fomex.in2ithealth.info/uploads/1/3/1/4/131482995/jerevekomi-wamobomebomos.pdf
    • http://files.sueannecelebrant.com/uploads/1/3/1/3/131397938/36f46b943e53.pdf
    • http://files.madronekitchen.com/uploads/1/3/1/1/131163832/xagebigiruput.pdf
    • http://files.spotonslgroup.com/uploads/1/3/1/4/131454090/488226dfb.pdf
    • http://kewiwip.am-tecsecurity.com/uploads/1/3/1/1/131163635/2233324.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/5280607651.pdf
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/koxabiwoxuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/72515615916.pdf
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/vogegumexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/8354667262.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/76190029991.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/81585530046.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/40504171875.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/web_design_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/autodesk_inventor_2020_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/41238248190.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/48267859107.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kurejala.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0675/files/15995369060.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_off0000a4e1.bin
30be7ec096252e77722c38e1b987c48f7d2b61b9503fa428d649e359d8026855		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E1 5124 bytes
font_01_sfnt_off0000b626.bin
22a887e1760d84f5857abade446dde2f8709dfdcd84daa55d7fed65d20d7238d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB626 11384 bytes

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