Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f45592dcd78980a…

MALICIOUS

PDF

92.0 KB Created: 2021-06-03 03:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c71d20de759294dd7782062e634ad629 SHA-1: c5699d609fce2091e159303bc7d18857e79f7bd7 SHA-256: 8f45592dcd78980a67158ae950ffcc1889e13bfab45f9091e4704700ec24c2da
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by a ClamAV signature and an ML classifier. It contains a link farm with multiple external URLs, including one that promises a game hack, suggesting a phishing or malware distribution lure. The PDF's structure and embedded links indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://crewmak.ru/pbw?utm_term=slither.io+mod+hack+apk+android PDF link annotation
    • https://jesixuruforake.weebly.com/uploads/1/3/5/3/135328729/3408477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468255/normal_5fd246044158a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482407/normal_5ffddc4d4915a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_60630206c952a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473919/normal_602ec6acda418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5fff58cac6b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_604181596e0a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_603849188c3f7.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/mapuwuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_603df57b62409.pdfIn PDF document text
    • https://jibukasuji.weebly.com/uploads/1/3/4/6/134657313/mivaxidunoxuguvax.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/d9b8e034-c471-4a09-8fef-615c90148901/zoom_g1x_four_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827a6d80-cd10-440d-ab20-6afb4ec71e48/asesinos_seriales_famosos_peliculas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043cea9d-138a-4bff-8d1d-2f7a42648847/mapas_de_karnaugh_4_variables_ejercicios_resueltos.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/55815384728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504ce5f4-a892-40fe-b727-705ea0037488/how_many_employees_mcdonalds_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afaddcc9-f0c4-447d-a971-e33142e7c2e8/the_maze_runner_scorch_trials_where_to_watch.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/f/49105631723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6118130b-cef0-4b51-9fd6-cd51f800ccac/vuvifataxabun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b55dd4e-94da-442b-a388-8353e4c8f496/how_many_previous_partners_is_too_many.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 5124 bytes
SHA-256: c56e136fc2ea931dfd07e1d27a80f2b6ebf24204d82c093ad57cc07d4d38f3c6
font_02_sfnt_off000107d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D3 2912 bytes
SHA-256: a0102b43bb497a2648ccd07afb5f1768487ca1dcdba8bbafae61374a59773315
font_03_sfnt_off00011429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 11944 bytes
SHA-256: 6fb55f8e3ab1966781d4ea3029e766a253826d0f5ae2e8720609b721060bc5bc
font_04_sfnt_off00013b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2F 16520 bytes
SHA-256: cc2cbde986ddef98fd296365c706a5dea57971d6a422ecaeb2690c90bbaf7247
font_05_sfnt_off0001519a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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