Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2957cb2b212c89a…

MALICIOUS

PDF

48.1 KB Created: 2020-10-29 09:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f5e9c5864bf7977479808e012a276c7a SHA-1: ca228fa89eb7c8cc57162fb85815aa4e04150afb SHA-256: f2957cb2b212c89a3c1dfc41686ea5ebdca75720281d277f6b3d1eccaea5edcf
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/123?keyword=mortal+kombat+x+mobile+cheats+download In PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/056d703baab4ae.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/zopitodofupomutoro.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/mozasekukigobeb.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/f26382ce38bd1.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/f1cfd7e6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/5_types_of_listening_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/lone_survivor_game_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6377/0781/files/combination_gun_safe_academy.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/pdf_file_free_download_for_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3296/1439/files/63109281736.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/bavuzawovewunedujov.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/duketuladepan.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/free_further_mathematics_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/national_immunisation_schedule_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7903/5808/files/69695043004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8998/3136/files/trade_skill_master_guide_wow.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/5029993055.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3E 5548 bytes
SHA-256: a5649e52962f965fa04efffd0e95896587ebfe7debd09a9ff18f0ba118c470f1
font_01_sfnt_off00008e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E08 10988 bytes
SHA-256: e8e1b1f34678d18a2e88224b650e447f6c17f7f0c04ced90d4e2ce5ade708f70