Malicious PDF — malware analysis report

Static analysis result for SHA-256 859332d4a5cdfd95…

MALICIOUS

PDF

79.7 KB Created: 2021-03-05 06:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0496ea5be9d024b537938d4c67e1ad67 SHA-1: 5dfbd6e1ac395f1da4c6d9bea2832e01a3f798da SHA-256: 859332d4a5cdfd950287ba364dd7af343031212ef3bd27b630d6b996baf9db6f
184 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are associated with redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Dell latitude e6410 drivers', indicating a phishing attempt to trick users into downloading malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=dell+latitude+e6410+drivers+windows+7+64-bit In PDF document text
    • http://indital.space/563531380452b1w.pdfIn PDF document text
    • http://resimpub.com/basic_dd_vs_add6wuga.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/75405597472.pdfIn PDF document text
    • http://grizhoff.ru/how_to_open_deep_freeze_configuration_administrator59wi2.pdfIn PDF document text
    • http://clientesdkb.com/c_e_a_ka_full_formhfwxn.pdfIn PDF document text
    • http://fortuneo-enligne.com/brother_hl-3170cdw_service_manualt7s8v.pdfIn PDF document text
    • http://carishr.com/milefegumufegipa5nyh0.pdfIn PDF document text
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/naganed.pdfIn PDF document text
    • http://leree6.club/bollywood_movies_list_2018tkic5.pdfIn PDF document text
    • https://patawera.weebly.com/uploads/1/3/4/1/134131312/eda2db2a89fa98.pdfIn PDF document text
    • http://rezotu.xyz/water_cycle_diagram_label_worksheetq8x6l.pdfIn PDF document text
    • https://xiwulugizasu.weebly.com/uploads/1/3/2/7/132741433/movabilugoz_duteki_nuzebemopoluj.pdfIn PDF document text
    • http://ilmahli.com/oreo_cake_pops_recipe_no_bakeatbh5.pdfIn PDF document text
    • https://wufavupo.weebly.com/uploads/1/3/4/3/134319323/4803510.pdfIn PDF document text
    • http://taygerr.com/murray_riding_mower_for_saled85m5.pdfIn PDF document text
    • http://instapriz.site/new_holland_tc30_parts_canadak9alr.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
    • http://wexipara.rf.gd/dvt_guidelines_nice.pdfIn PDF document text
    • http://pivomowofafo.rf.gd/akhiyan_da_surma_chan_ve_video.pdfIn PDF document text
    • http://nusilemil.epizy.com/nuvekabazijat.pdfIn PDF document text
    • http://lugimes.epizy.com/verujoxazek.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/23989305213.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 5540 bytes
SHA-256: 742acf0b5bf8b9270fc9b1111305493022754ab9599b8be4ce5e0cead660fb93
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 13240 bytes
SHA-256: f7ae32130a1f2692c425808b0a0fcb09e34a41e7c05f0d005411cc40a97398b7
font_02_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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