Malicious PDF — malware analysis report

Static analysis result for SHA-256 6323793f4f2db93e…

MALICIOUS

PDF

75.1 KB Created: 2020-10-30 08:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08214bb761e8431c1799da28eeedc9da SHA-1: 74b3fca319ffe350bf0f198afa53b6347e0c510c SHA-256: 6323793f4f2db93e0fe19d0924576c5b30760f18854d40d0d5ccbd09a25f51dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it leads to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'overkill 3 mod apk pc'. The presence of a large number of external links suggests an attempt to manipulate search engine results or distribute malicious content through a link farm.

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://gettraff.ru/strik?keyword=overkill+3+mod+apk+pc
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f875fdfb7bce.pdf
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5f8ff79946c9a.pdf
    • https://valoxapemep.weebly.com/uploads/1/3/4/3/134305175/gawejojesofuku.pdf
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/e9dfe0483.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farezelof/bible_verses_about_success_in_school.pdf
    • https://s3.amazonaws.com/gelawiweza/10771979203.pdf
    • https://cdn.shopify.com/s/files/1/0501/2163/8081/files/caesarean_section_nice_guidelines.pdf
    • https://s3.amazonaws.com/bisute/spiderman_vs_captain_america.pdf
    • https://uploads.strikinglycdn.com/files/e1f4e4c7-60a4-4bb2-8178-e4fbff10b784/71955303889.pdf
    • https://s3.amazonaws.com/fekaduvopigab/pumawasajimepikemotu.pdf
    • https://s3.amazonaws.com/tipikaxe/vopegidikafo.pdf
    • https://uploads.strikinglycdn.com/files/89504c82-b3b7-4419-a79b-b8bab2cab4b5/labereludukadefifo.pdf
    • https://uploads.strikinglycdn.com/files/33cfbc5a-16a3-4b56-8795-3f67cf529204/6475680589.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab74.bin
25c0bba19f432c36329fcb92034f94dd10b488a4dce69aacc8c0eb5d101bf100		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB74 6384 bytes
font_01_sfnt_off0000bb2b.bin
f23428470ae61e6eeacfbec0037f30209690a723c48032bf54f47186c76f54cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2B 5356 bytes
font_02_sfnt_off0000cd4f.bin
426fe9672b0f90d7365bedf853802a8fbe522e67ab0aaab6bc196248f99d1e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4F 5000 bytes
font_03_sfnt_off0000df15.bin
ec5b56febb2730d1ab67f69f9458736a528d2a75f43785df3c4a72417ee92918		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 12044 bytes
font_04_sfnt_off0001064a.bin
f445d771a9fddec3a392e932c8a7a35224482514ba01793daefebe06dc746517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 16616 bytes

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