Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bb60a5b1119d36…

MALICIOUS

PDF

47.8 KB Created: 2020-08-20 14:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cfdad3dc224cfbc5d3cf7912cfb6b8a SHA-1: 416523ca4b585def16fe797acbbfe448d4b39ac6 SHA-256: 04bb60a5b1119d36d8aff4a3db08bcc5f698e36d7642218c7a92759a73d6f361
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to suspicious domains and one is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs and appears to be a link farm designed to drive traffic to malicious sites. This behavior is consistent with a phishing or content-luring attack.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/pify?keyword=amilcar+cabral+writings+pdf
    • http://mopokilo.ksguns60478.com/uploads/1/3/2/6/132695643/sutitarisijojiwuge.pdf
    • http://files.spccmd.com/uploads/1/3/0/8/130874143/kupetibejolonov-lefute-putolubogipib.pdf
    • http://xelora.tonypalermolifecoach.com/uploads/1/3/1/8/131871390/gulifikuvorifunog.pdf
    • http://files.christianmeditationrookies.org/uploads/1/3/1/8/131856352/128d2fbf2.pdf
    • http://files.ryankarr.com/uploads/1/3/0/7/130739996/mologaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/52023733591.pdf
    • https://cdn.shopify.com/s/files/1/0462/4452/8288/files/champions_league_predictions_today_bleacher_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/48133333964.pdf
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/vonijotofuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/2596683179.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/bibefenirokogafetefiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7332/2664/files/1st_grade_math_multiplication_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/35302624660.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/xoduz.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006789.bin
ce9b3698017b632c537d0d92481aee9a97e34b0bf5b9adae95ca31a4d6148d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6789 5696 bytes
font_01_sfnt_off00007ad1.bin
d17b8a45621da75617a9e90b77ad6428f86256f635462768b48333ce8ea0d920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 10020 bytes
font_02_sfnt_off00009d4b.bin
1bbfed8e334bb90a5f9d7804257786d4ae38288f3118609b7815268b8043fba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4B 16036 bytes

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