Malicious PDF — malware analysis report

Static analysis result for SHA-256 9416989a3121b64a…

MALICIOUS

PDF

74.9 KB Created: 2021-02-25 14:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a73762ca5419701c85c34ba51b3f9522 SHA-1: c180fe4eeeaa66117335a314732c8a440bd4ea78 SHA-256: 9416989a3121b64ab2deac69bae72ac648c68a034bb92e6ea834bee06a1c673e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains numerous external URIs, including one that directs to a suspicious domain, likely to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to wedding attire, consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=what+to+wear+to+a+daytime+catholic+wedding PDF link annotation
    • http://digitaltoolsfor.xyz/susaniberajedao9cu.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/vapixutokumasovuwopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_602b2ea6deea8.pdfIn PDF document text
    • http://vigastlens.xyz/rareform_net_worth_2020syv0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_6015ddb9cff00.pdfIn PDF document text
    • http://rentline.pro/28663915174046v1.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/7397521.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/dawegigunusewigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_603554d152382.pdfIn PDF document text
    • http://manybigs.space/74514319762hway0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409096/normal_601a00822cc3b.pdfIn PDF document text
    • https://toviladul.weebly.com/uploads/1/3/0/7/130776498/razefubabijiv_matopen_lipapadikemote.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/diragotasunononanenuk.pdfIn PDF document text
    • http://timinome.getenjoyment.net/4888629405.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/zoloririvatulif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirilamezowi.epizy.com/texezuja.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/4th_grade_grammar_quizzes.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/how_do_you_charge_a_ego_t_vape_pen.pdfIn PDF document text
    • http://teraropabu.epizy.com/xikalamebajajuzomoko.pdfIn PDF document text
    • http://duvodix.myartsonline.com/what_is_the_ugliest_bird.pdfIn PDF document text
    • http://buwomonemagup.epizy.com/interpreting_circle_graphs_worksheet.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_off0000ebee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 5384 bytes
SHA-256: fa365ceaf55166e6ec6e3fdeaba5863c385d58b9f2a0ee831ff4cf51351d31c6
font_01_sfnt_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 9280 bytes
SHA-256: 511cdf8f03781f66d4080bab0b2c17edb24bbe8a980f9521cfcde77283022429

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