Malicious PDF — malware analysis report

Static analysis result for SHA-256 051414b442e31152…

MALICIOUS

PDF

84.7 KB Created: 2021-01-08 15:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1acb40ad08a217e804cbb0150a0009ec SHA-1: 7242aeefda22bf96edc78786076bb5312670752e SHA-256: 051414b442e31152227d25c3c65be1b53891f387790816fadddd767b6f2784e3
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily corrupted, contains references to 'Android automation testing with selenium' and 'wkhtmltopdf', which may be used as lures or to disguise the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://trafftec.ru/aws?utm_term=android+automation+testing+with+selenium PDF link annotation
    • https://jopokiwajisi.weebly.com/uploads/1/3/4/1/134108554/6e4e743.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/5b8bf3948c1e.pdfIn PDF document text
    • https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/rofavej.pdfIn PDF document text
    • https://ziwuvofoxovexo.weebly.com/uploads/1/3/1/1/131163777/438c53da.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/sgcjijd/inferno_galaxy_live_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/Xgcgjkb/voligovodojalusap.pdfIn PDF document text
    • https://wibiwiterudek.weebly.com/uploads/1/3/4/3/134373050/jebavut-zederevisi-zizuniwo.pdfIn PDF document text
    • https://janolonixo.weebly.com/uploads/1/3/3/9/133987325/6905326.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/S53p1Ai/7118403972.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dfac946-0f54-48e9-89ca-9252eb8e9c1c/rabbit_pedigree_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6fc800-e490-4b2c-9e19-3399390f8ec5/90834109314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456b4d6d-4c9e-43cb-be67-3a8e518ec267/38797163520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b7a079-8673-4622-9760-86d122274bb1/59066206522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d025efca-350f-478d-859f-1a653efc2dbe/15_gallon_sprayer_harbor_freight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d99a4cc-0786-4f14-bd6f-43c751ea2f43/dark_wallpapers_for_iphone_8_plus.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD537 5320 bytes
SHA-256: 9abfa3009ac30c55362066a3fbf6a11329fc32d095f61eee667d5ba2f5a2fb56
font_01_sfnt_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 10872 bytes
SHA-256: 3e1b26570d82f2ff82007988c796810d645e1284d476fcebbc7a8e17ff77a805
font_03_sfnt_off00011801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11801 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36
font_04_sfnt_off00012de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE5 6920 bytes
SHA-256: 8637d77a7d21ef50fe4417c0e29c438092fba56efcdfa05c9eef9f582de29881