Malicious PDF — malware analysis report

Static analysis result for SHA-256 381eb83712d4ce03…

MALICIOUS

PDF

84.3 KB Created: 2021-03-28 21:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b5fd127b695e43e756655b2da81e0bd9 SHA-1: 2a73d5c96f242dea120a6ea1aec29ced52db2457 SHA-256: 381eb83712d4ce0365b5894c56b4142dbc09b4404c7fa7dd2d43e84a34c5507c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains multiple embedded URLs, some of which point to potentially malicious domains, and is flagged as a fake invoice or payment lure. The document's structure and embedded links suggest an attempt to trick users into downloading a malicious application, likely for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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
  • 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://cdn-cms.f-static.net/uploads/4489988/normal_605d8b298a0a7.pdf In PDF document text
    • http://meetcabinets.xyz/93472811873w9j3d.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/is_no_game_no_life_light_novel_good.pdfIn PDF document text
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/9804351.pdfIn PDF document text
    • http://itsamorem.com/mai_tai_diffords_guidekk7s5.pdfIn PDF document text
    • http://wurigakisedepov.iblogger.org/61765808668.pdfIn PDF document text
    • http://pivowave.iblogger.org/21302074292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464863/normal_5fd2567665d13.pdfIn PDF document text
    • http://cybety.xyz/new_nora_roberts_books_2020eh3jq.pdfIn PDF document text
    • http://tonaginu.iblogger.org/50322988903.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/pozuxuxe.pdfIn PDF document text
    • https://juvosibizojeguw.weebly.com/uploads/1/3/4/0/134040958/7198950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_604b959e75858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fd644cd5837e.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/a1e7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=baixar+aplicativo+picpay+androidPDF link annotation
    • https://uploads.strikinglycdn.com/files/3dbd5012-44e3-4814-accd-9028d406352c/21053514426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ff6466-2059-4b42-9739-1b57d7e41ead/does_costco_carry_weight_watchers_products.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/nonajuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321b350a-c93b-4f27-be80-1386ee47050e/fezuguwebomotow.pdfIn PDF document text
    • http://vejikavufabaj.epizy.com/atualidades_2020_para_concurso.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/how_to_buy_original_warcraft_3.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_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 5168 bytes
SHA-256: cafc9be8e3a4d7993e7183d298bea77733af4e3de6f37cff83ef4ce22be1ab7c
font_01_sfnt_off00011aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAE 13476 bytes
SHA-256: 9904beea0d7abd8882dbe22d8eda129630d59518ffd05b4859fd52d2c45951ce

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