Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f8837001391855…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 21:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d808b07ec5b5322da0a4d1f6f891d721 SHA-1: 9e924754b070049bf4a4e78da7fe38d29210b818 SHA-256: 66f883700139185576ded9136225f9ad8c25f5a03cdfcb4a3dbdae9165b02b0a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a redirector, which is flagged as malicious. The document body text and heuristic firings indicate a lure for a claim form, likely to trick users into clicking the malicious link. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to distribute further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/wb?keyword=mibco%20provident%20fund%20claim%20form%20pdf
    • http://nunigeri.therubythroat.com/uploads/1/3/1/0/131070761/90825667c.pdf
    • http://files.windhoekradioflyers.com/uploads/1/3/0/9/130969986/7d044004a48.pdf
    • http://tekogeku.jessica-yeeun-kang.com/uploads/1/3/0/7/130739826/dikisuvebixopuvub.pdf
    • http://files.zhaobaotaichi.com/uploads/1/3/1/3/131380485/6735518.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3218/0893/files/40585177666.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/nekigevanizul.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/gepopulob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.pdf
    • https://cdn.shopify.com/s/files/1/0439/9484/1246/files/android_9_galaxy_s8_plus.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8437/files/71396024568.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/67913245971.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/xewegimekexig.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/aarp_landing_party.pdf
    • https://cdn.shopify.com/s/files/1/0448/0643/9078/files/haryana_gk_capsule.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/68642672976.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c8.bin
a8b13cc2787eb9b418c4f699198f9a2cab1672a321444489c2406fad53a24b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 5328 bytes
font_01_sfnt_off000072d3.bin
6529a87df6960dab8ba60faddaf17ebabb868b5c69c902a1702065e335deead8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 10672 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.