Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e6ae7c6798e38e…

MALICIOUS

PDF

81.4 KB Created: 2021-05-01 20:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7f4988e53c21587b0185b3403cbfff1b SHA-1: 73be973d21e3b103b87856d5d405bdb2e377dea9 SHA-256: 41e6ae7c6798e38ea68568a250328140650f0015896098c7b2d549927c34f8bc
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://druttle.ru/strik?utm_term=lg+stylo+5+tracfone+walmart', appears to be a redirector for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://druttle.ru/strik?utm_term=lg+stylo+5+tracfone+walmart PDF link annotation
    • https://fonevufaj.weebly.com/uploads/1/3/4/4/134444269/zapuletapomit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_6041dcc07576f.pdfIn PDF document text
    • http://fowirunuwajuk.iblogger.org/gixetegejadazevunofurazuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_60636638e4886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_6001d528c08bd.pdfIn PDF document text
    • https://kuzasafeg.weebly.com/uploads/1/3/4/5/134586407/5f69472d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_603afdd1899a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_604d79e4cdf45.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/xujolafugibilem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_89c1cfb5a49b48ccadff970974047358.pdf?index=trueIn PDF document text
    • http://zivikabazixo.epizy.com/tobutisupiputujaxakisuxos.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/harry_potter_the_prequel_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/xojepefuruzisararenopa.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/blank_world_map_with_continents_and_oceans.pdfIn PDF document text
    • https://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_e57690f64d004a548e2572e033cb8e4e.pdf?index=trueIn PDF document text
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_7cf36f37493c456b9cfb83b606bae6ba.pdf?index=trueIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_61c98723a6fe4488b35a8d8b982d90f9.pdf?index=trueIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_fd8960cc30f149a5b4f36ed0c3a09408.pdf?index=trueIn PDF document text
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_751f4a9bdcf540ddbe91e2fbe4ef80c2.pdf?index=trueIn PDF document text
    • http://wizajevul.epizy.com/what_is_a_james_bond_called.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_a5caf16e973c4b5db16b7f14a99c15e3.pdf?index=trueIn 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_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 5460 bytes
SHA-256: 95f5de90fd0bcaf2a0865e1f97d9bb9dbc1f19698c7898c68b9c32afb7e9223f
font_01_sfnt_off00011055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11055 11712 bytes
SHA-256: 19d07fbda5216a0ebaa18bf6cc2e02ea2368ed05feeeaf99a0ab0f12f3e3f454