Malicious PDF — malware analysis report

Static analysis result for SHA-256 76abb0ec22f4df9e…

MALICIOUS

PDF

83.7 KB Created: 2021-03-16 23:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f52cb5b71aa5164b49ba34b7ffb29649 SHA-1: 24c37bb897e11b129862bc6a0eedc995c225968b SHA-256: 76abb0ec22f4df9e2957972302b8a484b2335f870d3c7cba020274d66ed72cc3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'Kitchenaid blender service manual'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links to disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/wix?keyword=kitchenaid+blender+service+manual In PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/nixoriwuxa.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/a7a315b649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_604af2b796d06.pdfIn PDF document text
    • http://astropsychology.site/79178394885odpic.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/gfTiirJ/stumble_across_definition.pdfIn PDF document text
    • http://meetlait.pro/bedevilled_movie_freesgrn3.pdfIn PDF document text
    • http://everydayy.fun/767658964457u1fh.pdfIn PDF document text
    • https://naviguxiva.weebly.com/uploads/1/3/4/2/134266723/lemenuvik-fiteluremu.pdfIn PDF document text
    • http://rat-red.space/can_t_update_software_on_macbook_prour3ue.pdfIn PDF document text
    • http://helpcreditscore.info/47611014289assts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_6026531b1fad0.pdfIn PDF document text
    • https://nolaxefipox.weebly.com/uploads/1/3/4/7/134740184/ditujasarex-nazemurojaluso-paluxekisade-majamawolaz.pdfIn PDF document text
    • https://cdn.sqhk.co/perolurowona/thilgdE/bukikipusabi.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/enfield_council_report_repairsnjz6m.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/cjc3oym/12984359431.pdfIn PDF document text
    • https://wapafakomix.weebly.com/uploads/1/3/4/7/134740591/jukip.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/cVbghib/29362914207.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/aihigc9/hacker_s_keyboard_apk_1._40._7_download.pdfIn PDF document text
    • http://stnold.com/bugukapiwez68w7y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409819/normal_5fe4480fd017d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4822cb-08a7-48a2-86f7-5167a9048c2f/32917155422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5923f7d8-6599-4843-a752-93b377fd9322/honda_power_steering_fluid_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88629d5a-c27a-4578-b161-a9c92f792a63/schwinn_270_exercise_bike_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8edd44-0b6e-44c2-ab51-0109b346a7cd/how_to_get_coca_cola_kit_fifa_21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89cb4e6-666f-4339-bfaf-ce9a0b2fdb1e/fisher_paykel_dishdrawer_error_codes.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_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 5348 bytes
SHA-256: 00232b84060da00b7264ec6a216c03e19858b914a121e21c8f3daecbb9d233aa
font_01_sfnt_off00011b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 11116 bytes
SHA-256: f9805c21e99c5a881c4a08c6b4d81246cb981fb5b45a910a5a2bed14d3431a7f