Malicious PDF — malware analysis report

Static analysis result for SHA-256 291e8287175288d4…

MALICIOUS

PDF

80.3 KB Created: 2021-03-30 20:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32d1b6a72e482534dd66be1494d83389 SHA-1: e417448a4a47847c7b95b6cdf66a797ee13f8d3e SHA-256: 291e8287175288d4865f149990b44dfff35e0c3e44395ba95ef27cf5d15d6554
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to PDF documents, suggesting a link farm or phishing lure. The heuristic 'SE_MFA_LURE' indicates the document likely attempts to harvest credentials or session tokens by mimicking multi-factor authentication prompts. While no scripts were explicitly extracted, the presence of numerous external URIs and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://xajibur.ru/strik?utm_term=how+do+i+update+my+garmin+navigation+system
    • http://tipofeliluget.medianewsonline.com/living_room_interior_design.pdf
    • https://linerebe.weebly.com/uploads/1/3/0/8/130813546/8477272.pdf
    • https://samugunu.weebly.com/uploads/1/3/4/7/134701516/0aa1c85c21.pdf
    • http://fumexijana.getenjoyment.net/fidic_joint_venture_agreement.pdf
    • https://vujajewuriwox.weebly.com/uploads/1/3/5/3/135387523/kowasisusi.pdf
    • https://dakuwiremab.weebly.com/uploads/1/3/4/9/134901294/8291298.pdf
    • https://xanerenidijuv.weebly.com/uploads/1/3/0/7/130739333/zuponasiwegedimawa.pdf
    • http://dopogabijup.mywebcommunity.org/how_do_i_setup_my_honeywell_thermostat_app.pdf
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/7045839.pdf
    • https://boxudeso.weebly.com/uploads/1/3/4/3/134320939/6046081.pdf
    • http://xomerisupudegop.medianewsonline.com/fefoladukevut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_6dc865028429409b98834466f1139c79.pdf?index=true
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_7d9f232aa69b4d9697732cce18f8f39b.pdf?index=true
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_fd7e9a97023e41e397dcac767e4691a6.pdf?index=true
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_d82c42e3abbc443eb7c3e70ba4844c04.pdf?index=true
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_16e0aa5b858649ecbd996aa2d5a201d0.pdf?index=true
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_bbb24f40a8f448a384998abcd143f8e7.pdf?index=true
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_3196876ebde14e0ab9e28d0dba7e6a72.pdf?index=true
    • http://satovimowenijor.myartsonline.com/experimental_archaeology.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc8.bin
54cde17f5638a544eff616e3b59b90cdc423f8589ff310c77bdbb3f91618b875		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC8 5344 bytes
font_01_sfnt_off000101fb.bin
58e99220a2da5642cae4fd5a3ff5cd047c13f0767eb99b2ae54f6f09ca9fc286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 10264 bytes
font_02_sfnt_off0001251f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1251F 4324 bytes

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