Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e56940443219b8…

MALICIOUS

PDF

611.1 KB Created: 2021-05-28 00:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1cdfcee7b0211d6053903c42ae8ce623 SHA-1: a71bd0bc36528d8afea23a85a06720f73c3e673b SHA-256: 78e56940443219b8d1a9765b8fe054310122a1c54b1f06dc761120f117fc16c5
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a credential phishing lure. It impersonates Microsoft Outlook and directs users to a redirector URL, which likely leads to a phishing page. The presence of external URIs and the ML classifier's output strongly suggest a malicious intent to trick users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6962

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/7585551.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://kuzutuzo.ru/strik?utm_term=personal+finance+turning+money+into+wealth+6th+edition+answer+key PDF link annotation
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/7585551.pdfIn PDF document text
    • https://gumopaxegekugod.weebly.com/uploads/1/3/4/0/134018731/sanoniwi-levaku-viguguzulele-lanepukomesogep.pdfIn PDF document text
    • https://pokuzasovud.weebly.com/uploads/1/3/4/1/134108684/1162499.pdfIn PDF document text
    • https://diritirafimiwav.weebly.com/uploads/1/3/4/3/134376035/c96785627e23.pdfIn PDF document text
    • https://jugifipunud.weebly.com/uploads/1/3/1/4/131437595/gozivuw.pdfIn PDF document text
    • https://zuvixane.weebly.com/uploads/1/3/0/9/130969636/gobabibofabonus_piguzifesuti_funef_wikomubaxi.pdfIn PDF document text
    • https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/dupek_bupavirivaxez_nevesimi_lerob.pdfIn PDF document text
    • https://wuwemupijebuvat.weebly.com/uploads/1/3/4/0/134012408/27e31399.pdfIn PDF document text
    • https://fevapeju.weebly.com/uploads/1/3/4/4/134468187/9869957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_60521ee79ced2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_601c62a070730.pdfIn PDF document text
    • https://mapevitesofik.weebly.com/uploads/1/3/1/6/131606073/9330713.pdfIn PDF document text
    • https://tixamipoku.weebly.com/uploads/1/3/4/7/134740597/f485bfe.pdfIn PDF document text
    • https://togasiwivote.weebly.com/uploads/1/3/4/3/134370981/5409450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a30a7a48-8616-4834-a569-30e4fb8039aa/la_biblia_online_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16dd986-df49-4c24-a753-4b65091a2dce/7_snf_szckte_anlam_konu_anlatm_eitimhane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b094050-54e4-4296-9d11-01cc5b8c3206/vefowilezagafanakifogemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a835bc-f90c-40da-9aa2-5e534bba4689/72347203871.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00090c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C44 5728 bytes
SHA-256: 18e5916fc77d9add2dd87163f3f960c459e0fa77f531c654687b7ff43cb20526
font_01_sfnt_off00091f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F9E 1808 bytes
SHA-256: 209c34120f9536e901b24cca02f20288afb9de49324e7cf337afbe52d744e7a2
font_02_sfnt_off00092816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92816 13280 bytes
SHA-256: 269fe415bed80197a3b91e6532c144041f3002f4d5ffb74516530b9dc2186d2b
font_03_sfnt_off0009550d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9550D 16448 bytes
SHA-256: a2419374da93af1e62e9a09abd5584f4a5d3351f83f3cbd06d610d4e26308288
font_04_sfnt_off00096b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B4B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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