Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12ac850b5d61fa2…

MALICIOUS

PDF

96.7 KB Created: 2020-11-01 15:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c5f2aeb841d694fbee3b27a4636a6ef6 SHA-1: d7f301457b20a9710b70f59c3e30076105d6852d SHA-256: f12ac850b5d61fa274a8ac4e359c12a6779152111a75c696428b2e915f5660e3
210 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to 'Ohio schedule of credits instructions 2018' and includes a link to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.link/123?keyword=ohio+schedule+of+credits+instructions+2018 In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/1969782.pdfIn PDF document text
    • https://bafafodalub.weebly.com/uploads/1/3/4/3/134367540/pikaxirulalelim-dewajipijalaged-bedifo.pdfIn PDF document text
    • https://likoxijisopo.weebly.com/uploads/1/3/4/4/134460370/wozar_buwof_bevalolawavu_mamuvoselop.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/65bfaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tadovu/50712536583.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/k4kio_hex_beam_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/empire_earth_iii.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/fitonukafasepol.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/lakugidufejabawib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b7b2be-eff8-41eb-bb1c-64889a06016d/bibapakozarixubofujidoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3484cd1-626e-4adb-a468-c4e499e7c609/nolipokunoj.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/fodutagoxafogolanag.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/que_es_el_radicalismo_alfonsin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5adbe849-2e19-4486-9e1a-0541fa8caef8/kawijufolalax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7cf2d5-0a20-426b-ad40-59d00b038883/77111485895.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/29848984200.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 3984 bytes
SHA-256: f839442785dcb175ed8fbf30652004a3195b96f6772b72b891c6f2dc07c384f3
font_01_sfnt_off00012ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE3 5444 bytes
SHA-256: c14784e06c08065eae314b73c3f718b85df9b781941b42fd9b1851f7cf9c5e66
font_02_sfnt_off00013d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6B 11100 bytes
SHA-256: 3c702799c0528fd6cd786fb15d72b44033d6b7c9f45e70821fa2676ccf47f8ab
font_03_sfnt_off0001636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1636A 4436 bytes
SHA-256: 401f16ef948482cd35f41c6e6528be2e69065f567b2c39539981b812c72016d0