Malicious PDF — malware analysis report

Static analysis result for SHA-256 872dba6fb700da31…

MALICIOUS

PDF

102.4 KB Created: 2021-04-09 11:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d35efc2222d900f5e45b54ddae1d55da SHA-1: 9e9ad5434d863dbd9290204e2713e4df8d389af2 SHA-256: 872dba6fb700da31299513ac3038498f8fed78b459ab8d065a6fcae33fcc4b73
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm for SEO or malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to drive traffic to potentially harmful external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://zajinet.ru/strik?utm_term=what+is+death+note+volume+13 PDF link annotation
    • https://s3.amazonaws.com/gajakelegeza/47589368206.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/how_do_you_feel_today_answer.pdfIn PDF document text
    • https://wojazaxu.weebly.com/uploads/1/3/4/5/134589930/xuziro.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/advantages_of_jumping_rope_exercise.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/pre-wired_aswc-1_harness.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/78ece81831de.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/soruwobujopuboviridexujiw.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/how_to_read_sewing_needle_sizes.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/fadezexamop_latotixi.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/intraorbital_foreign_body_reporting_course.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/mewulo_kudakuvoges.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/biodegradation_of_lignin.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/tukubujopak.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/electrical_pid_symbols.pdfIn PDF document text
    • http://rufawefojag.sportsontheweb.net/canal_av_desbalanceado.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://ferugasa.epizy.com/gevevatuzabafolusik.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/wawakujutunovaxotukiwiv.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_f638abafa2ad408ab88da867270e813d.pdf?index=trueIn PDF document text
    • http://dinexun.epizy.com/40379897264.pdfIn PDF document text
    • http://lepetape.epizy.com/ncert_class_8_science_cell_structure_and_function.pdfIn PDF document text
    • http://zasexizo.rf.gd/what_are_basic_linux_commands.pdfIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_0faf98ac6a774704a4085f06ba4cf4cd.pdf?index=trueIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_d6ad131347a44707a9f7a6774a389948.pdf?index=trueIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_fc62d9cc0ae14daa9fb07e0dccf6714c.pdf?index=trueIn PDF document text
    • http://nivuzujanux.myartsonline.com/22151819192.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
stream_002_off0000f9b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF9B5 17112 bytes
SHA-256: d74c13607ed6db15389c02039b70a8596c294b5af58c6486e51aa827ce3dcc6e
font_01_sfnt_off00013018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13018 5140 bytes
SHA-256: 6666688496126952e6a8b3f7d95dae3dcb292f12b62d6149e15b5a9522056e64
font_02_sfnt_off0001417b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1417B 11628 bytes
SHA-256: ab01ab46cd3d0fc309fbe384de8a7abc1c635a32433db6c6dc235617c41bb504
font_03_sfnt_off0001687b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1687B 16076 bytes
SHA-256: c26df5a654703d82c4b49e3d99d7624c72720c83e2144c41d2616ef18af3c653
font_04_sfnt_off00017d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D29 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2