Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ca78970499ddd3…

MALICIOUS

PDF

78.6 KB Created: 2021-03-04 21:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: faebaf646840b2e59dc4a1c0fc4220db SHA-1: 8a13080b748533de080f34780d949d1adaf290f6 SHA-256: 84ca78970499ddd33af93dc01fe64763a0a8b686c3cacba864089f5fb8af2072
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The PDF document contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or abuse multi-factor authentication. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://resalured.ru/wix?keyword=azur+lane+reroll+guide PDF link annotation
    • http://reduslimitalia-official.website/porque_cuando_como_me_da_mareo1dmph.pdfIn PDF document text
    • http://mon-fortuneo.best/school_parent_app_for_pc_free_downloadx12oi.pdfIn PDF document text
    • http://topchambre.xyz/nordictrack_skier_for_sale25ol2.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/zemoxescabqm.pdfIn PDF document text
    • http://ita-fitness.fun/pixel_starships_layout_guide9e1f2.pdfIn PDF document text
    • http://healthit.space/formaldehyde_technical_data_sheet3pfio.pdfIn PDF document text
    • http://xsafak.com/us_citizenship_test_answersopcmi.pdfIn PDF document text
    • http://itagreen.fun/kuvomurewomopozo9jjs0.pdfIn PDF document text
    • http://tibetterrier.ru/fanofajuselafaleginisopnydsr.pdfIn PDF document text
    • http://xxlmature.site/403158151432ydh9.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/22142862109.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/aquasource_bathroom_faucet_cartridge.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/zitoledolotibekemuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_a31b1ba6c8a7448fb4a5e44682c852b1.pdf?index=trueIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_a66f2c51eacd46d793965540472b1d7d.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_182c239adf0f4fd28e9f6b3e2c7d5a42.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_371390aa8f7a4f2b8aae628502669a00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb3a3e55-e68e-4b76-a35f-8cf73c64d80f/xudonunotav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a296007b-db4a-42bb-bcba-781daf1eb449/libupovuguwodogetilabifar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ff38de-2a1b-4fd8-a531-e26b964af11c/cool_white_outdoor_christmas_tree_lights.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_b0e59839777548d7ae4272f5942d2bbe.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_210157ebc6374da5a213607cec446d4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4384a62b-51f9-4a5c-b0fd-22958a67763f/6203927583.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_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 4856 bytes
SHA-256: 2c1a76f8466a102ddd205b5ad9cb04d64974e9e71c55edcd5d224080d6329748
font_01_sfnt_off00010832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10832 10864 bytes
SHA-256: eddcefe27be01698ad3e6864237d6ffb21190a7bbfa1bdd577d5211cc7860c06

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