Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71ea05ae11d8799…

MALICIOUS

PDF

75.1 KB Created: 2021-03-16 13:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 217bad1be00d330fe6c6f442012d8c18 SHA-1: 915c8f467cb5a0240876b1faf6137bdb2dc15891 SHA-256: c71ea05ae11d87997e1499e6d4526eeebecd4b9868d612b514caadb55e2ab2c9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The heuristics indicate it uses an advance-fee scam lure, presenting itself as a parcel delivery or lottery notification to trick users. The document contains numerous embedded URLs, with at least one, 'https://xezojetit.ru/wix?keyword=tangerine+worksheet+answers', being a primary indicator of compromise, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/wix?keyword=tangerine+worksheet+answers
    • https://static.s123-cdn-static.com/uploads/4384029/normal_5fe11b071a675.pdf
    • https://static.s123-cdn-static.com/uploads/4388158/normal_5fe2d8162d333.pdf
    • http://vodabutopidaru.getenjoyment.net/can_you_add_a_subwoofer_to_bose_companion_2.pdf
    • http://gejokakop.mygamesonline.org/53695516863.pdf
    • http://vobigivu.22web.org/celestial_bodies_free.pdf
    • https://cdn.sqhk.co/pobopuwubox/egeVhgp/best_psx_emulator_for_windows_7_64-_bit.pdf
    • http://pidagenavuziw.mywebcommunity.org/nanosoleguzelevowo.pdf
    • https://ditixalopu.weebly.com/uploads/1/3/1/4/131410538/d271b90d92c5e13.pdf
    • http://pifemukopisare.sportsontheweb.net/rovojexesekegenexe.pdf
    • https://cdn-cms.f-static.net/uploads/4373753/normal_6037568b0b76c.pdf
    • http://worameruvejaka.mywebcommunity.org/garmin_astro_220_instruction_manual.pdf
    • http://jijukilodo.iblogger.org/chisana_wireless_earbuds_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4446036/normal_6013be375778b.pdf
    • https://cdn.sqhk.co/bajafigotuvi/ejegd3K/amazon_relay_customer_service.pdf
    • https://cdn-cms.f-static.net/uploads/4393348/normal_6016f7fcd53d7.pdf
    • https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/5803579.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/samopakamefap/letter_from_santa_template_uk_free.pdf
    • http://tifilumiteva.epizy.com/the_maze_runner_4.pdf
    • http://varunogozanog.rf.gd/bojangles_calories_biscuit.pdf
    • http://nuzabasere.rf.gd/53107914666.pdf
    • https://s3.amazonaws.com/jodabiladezot/application_form_for_british_passport_in_australia.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e996.bin
bba1ba181945c575033ce7c47c81b700158fc7a49fc1de7aaabf3ca277666a41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE996 5020 bytes
font_01_sfnt_off0000fab9.bin
9de4be5b81f819935e11d09b9e246be506b45dfc59bf14a170b7ea2e199f6e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 10720 bytes

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