Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbb822ba47e095c…

MALICIOUS

PDF

94.2 KB Created: 2021-03-08 03:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fd616a1d40f2daaec28c3aff4de791a7 SHA-1: e6aa0236b31e206a4448f91c96e136bb0f8680b2 SHA-256: 0fbb822ba47e095c56499e9cc94a57806e65ac3f8da66217196e1a9ba86a40ce
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this behavior. While no scripts were directly extracted, the presence of external URIs and the ML classifier's high confidence score suggest malicious intent, likely to lead users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://xezojetit.ru/wix?keyword=persona+5+hermit+guide PDF link annotation
    • http://goldstein.berlin/zokurisibavunowarltcqa.pdfIn PDF document text
    • http://organic100.fun/leatherworking_guide_1-_300_classic_wowm87rl.pdfIn PDF document text
    • http://nutristrike-shop.ru/zombie_killer_squad_mod_apk1ompx.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/how_to_change_the_waste_toner_box.pdfIn PDF document text
    • http://buxozadogaro.22web.org/sozidowaka.pdfIn PDF document text
    • http://salonly.xyz/ballet_piano_music_freehzo5f.pdfIn PDF document text
    • http://kejurudoji.medianewsonline.com/wobulonelazegetejowirip.pdfIn PDF document text
    • http://vegofejolafud.mygamesonline.org/ziribijikolakove.pdfIn PDF document text
    • http://cherrypimp.online/pre_algebra_with_pizzazz_answer_key_page_204k57mx.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/percy_jackson_auditions_2021_disney_plus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_9623a280360f43b3aa5bae9a7158b6ec.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_e0fd8d58ff0a41118806fed0b49efd1a.pdf?index=trueIn PDF document text
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_f413adf7429c4842945966bb2f39c4bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c9fe8e-a736-4cc5-a0d7-774b4aa213b0/kawiwusofopededoxi.pdfIn PDF document text
    • http://moretavumafoge.epizy.com/historical_development_of_entrepreneurship_in_nigeria.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_d23c380394924a3fa72ca24b9788623b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c471700-2d06-49f6-8f31-73e70976f667/mipedibala.pdfIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_da44b84301084046ad56ee9928eac90c.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_d29e8de9171148f0bc4b7b20ffa3859f.pdf?index=trueIn PDF document text
    • http://duzebufulumaw.epizy.com/zebatopemidurosodedas.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/business_analytics_definition_by_authors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf747af-a468-4e4f-8c05-a94d49a98de0/ritufozinakenetavul.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_533e163f76f845f88b40ffa66001ad0c.pdf?index=trueIn PDF document text
    • http://giwuvupajot.epizy.com/insert_excel_sheet_in_word_doc.pdfIn PDF document text
    • http://rixaxapuroveto.rf.gd/avery_label_template_5160_mac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1C 5332 bytes
SHA-256: 65411d7dadd16bf36a7606d849e9eeda35741b950fba07a6eb9b05d343814dc3
font_01_sfnt_off00012f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F13 11516 bytes
SHA-256: d18dc52b8729eb2185aeb0da3dfdcfbde16819b31431ac1fca29a7c96a8dc438
font_02_sfnt_off00015577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15577 16240 bytes
SHA-256: 281214d1119d96f3a8ebe36682ff3c94e77595198e0ed7d049f81fad77dcdf11