Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb90910de93cea1b…

MALICIOUS

PDF

99.1 KB Created: 2021-04-09 21:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16961903e9247f9a7bda00e5d4a2c650 SHA-1: 92fadae4ebb0ed586dbebd3600cf863c30ebfa40 SHA-256: eb90910de93cea1bb3f280f6f16a554fb3092ab011f70719876442df169e0ced
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=low+carb+cheat+sheet+for+dummies PDF link annotation
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/ralorofidapoz-pirilasob-xojakegemon-tuxijuwuga.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/gjqcYhe/ronexadabiwagilezo.pdfIn PDF document text
    • https://nanawoxemataxu.weebly.com/uploads/1/3/5/3/135332584/nonutivax_kijadibe_sisujozedo.pdfIn PDF document text
    • https://cdn.sqhk.co/xevuvuxene/jdWhiW4/difavupupakapa.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/0gigiMg/insanity_fit_test_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f71220c-27a2-47c1-8e8e-5342add650eb/how_to_lose_weight_while_weight_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318f760a-048e-41e1-be5f-50efdb7c0284/wutejikuvomelewujibetuliz.pdfIn PDF document text
    • http://kodivukijadu.rf.gd/20020055293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95c0a34-31c8-4b87-9c4b-c5b106807f26/77854439352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f034cba-5494-4ade-9c17-bbf99b0707a7/how_to_learn_technical_writing_skills.pdfIn PDF document text
    • http://sesufoloj.epizy.com/rixozogumuzewatimiriwij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0596e04b-485e-4728-a370-cce83c7f36aa/14279482869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727f6990-01f5-443a-80a1-f25c98750faf/durizofiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b92ba3-af59-45b2-a076-3ca9b13f788b/sql_in_10_minutes_a_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c28d3e4-48c2-4ecc-b4ea-8ca72eda23cc/porsche_964_owners_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0cccdb-a8bd-4c59-9845-ff6508261537/3178769651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7814dda-4269-4617-90d5-31e67ff75c58/whats_the_difference_between_dogs_and_cat_fleas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb5adbd-f424-4600-a485-1454910b4f52/bibewenolikiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f1ee8e-e8db-43f3-af5c-12d293cc3ad3/magic_tree_house_mummies_and_pyramids_reading_level.pdfIn PDF document text
    • http://boxugajot.rf.gd/aadukalam_movie_hd_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78d0fd2-984b-49fa-ae80-e23b4bda7ee4/2017_toyota_corolla_radio_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b947af-3df6-4478-a7b2-4d289886b9fa/nj_transit_bus_ticket_zones.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://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_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 5404 bytes
SHA-256: 64347e7c8b28473bd20b56ec78125b0d27126497850748e7faf9740d419be4cc
font_01_sfnt_off00011179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 12184 bytes
SHA-256: 27a6bf3064abc09fe0b9ba1e6f51868b1e6748ce86ee860298100bfc50f7c885
font_02_sfnt_off00013869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13869 11524 bytes
SHA-256: c1cb23f81c00bf1b7682c2546a4c6384711e7d557ce200ac48bc707a46cf5520
font_03_sfnt_off00015f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F96 16264 bytes
SHA-256: d55cf24d36e311b997eede26b6aff608cd72f118bd46741adc5054db369785e4
font_04_sfnt_off000174f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174F3 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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