Malicious PDF — malware analysis report

Static analysis result for SHA-256 f028e802fea6418b…

MALICIOUS

PDF

33.1 KB Created: 2020-08-06 16:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32f88165be277002a39578f631b4b994 SHA-1: c252b9ed7edb7381e40e8106dc120d6ea400cd06 SHA-256: f028e802fea6418b1b8fb6188d63ef3bbe0d0cd04e1a32ae6116bb710b73c39e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though obfuscated, contains text related to a '2006 gmc envoy repair manual pdf files' lure, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector indicates an attempt to lead the user to a harmful site, likely for credential harvesting or malware delivery.

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.cc/wb?keyword=2006%20gmc%20envoy%20repair%20manual%20pdf%20files
    • http://pabufudu.animalgrace.co.uk/uploads/1/3/1/0/131070786/temajek-sezolemugepeb-resadasakad-numikaxozog.pdf
    • http://files.jericosoundsystems.com/uploads/1/3/0/7/130739069/tokoge.pdf
    • http://files.mangoconstruction.com/uploads/1/3/1/4/131437984/4441414.pdf
    • http://files.sevenoakschilddaycare.com/uploads/1/3/2/8/132816066/tifopijol.pdf
    • http://files.magnuskravik.com/uploads/1/3/0/7/130775145/d012aa05abb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/zasinuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/bjt_circuit_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/79646034058.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/2486239883.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/49641957948.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/nukudusajemejalukawel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/powerscore_logic_games.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/6778740763.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/bedaratonifokise.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/calling_sehmat_english_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9697/files/vifepikoxuzegumuziso.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_off000046de.bin
6e974d606e2be75d117cb875e269a9494d29d2f7bb7a9b3d75afae476708edc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46DE 5972 bytes
font_01_sfnt_off00005b2b.bin
ee344cf9a54013d1a6ced572c1d55a2697ceada80eea51f2a260c308ed0e8b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2B 8384 bytes

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