Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f52b41658c4aac…

MALICIOUS

PDF

58.9 KB Created: 2020-10-07 03:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 530d32df3d6867fc1a4d7149db2029d5 SHA-1: 45a2fc43f1f1b15d906dabfaf070b170da8fcadb SHA-256: 96f52b41658c4aac576eda632041b7e6093d864da16423020b66a463f2d4895e
194 Risk Score

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.
  • 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.
  • 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://cctraff.ru/strik?keyword=ejercicios+resueltos+de+movimiento+caida+libre+pdf In PDF document text
    • https://site-1038522.mozfiles.com/files/1038522/52266349983.pdfIn PDF document text
    • https://site-1038717.mozfiles.com/files/1038717/komadoxusadav.pdfIn PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/gososajipanufabapik.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/notovip.pdfIn PDF document text
    • http://ropani.fryingpanequestrian.org/uploads/1/3/0/8/130874232/ponibewuruvodivapo.pdfIn PDF document text
    • http://files.boundarycountylibrary.com/uploads/1/3/0/7/130775786/4857319.pdfIn PDF document text
    • http://wazojeba.crystalmarull.com/uploads/1/3/0/8/130814110/fozolatipixi.pdfIn PDF document text
    • http://zulaz.theschoolofrevival.org/uploads/1/3/1/3/131379540/zifiredinugodezip.pdfIn PDF document text
    • http://files.baileysandouille.com/uploads/1/3/1/4/131407493/xenaz_xizotijuzel.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/1/0481/3809/2707/files/soundcraft_si_expression_3_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5147/7913/files/char_broil_tru_infrared_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2384/2718/files/minecraft_ps3_mods_download_usb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3950/5054/files/the_mendeleev_activity_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5524/2647/files/bissell_pet_stain_eraser_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d79d1ba-8592-4b8e-8005-2ed34a93e960/2170395940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d573d1e0-3140-49af-9c61-f71d11be3d88/70369448461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84b89a2-098f-419d-8adb-27022a9e29e3/71021148521.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7127 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000811b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811B 5536 bytes
SHA-256: 9d8cc8ef1fe69e9e3cf2af066043f97a043a69f5b48f30cf2c5527711fd54e2b
font_02_sfnt_off000093d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D4 3676 bytes
SHA-256: 8557e22890982bcf48a5349cdaae36a85fbaafab5416c10e97c1e14c074d71ef
font_03_sfnt_off0000a1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1CE 10848 bytes
SHA-256: fffb5224a11271ada34453be99ef7e76064024b361d7f92a5432e806e7165dff
font_04_sfnt_off0000c54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54C 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189