Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8eab5d63b0871e6…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 19:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 03b638041f95b516a895728109d32793 SHA-1: c3d66e51be432ebc111e49a2d70f391677f1fa8a SHA-256: b8eab5d63b0871e6aa3442a0f7066b04bae9c4583a4b1098bf1e14218016ba4d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically mentioning 'texas instruments 30xa battery replacement' and leading to a link farm. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://gimoguvi.ru/strik?utm_term=texas+instruments+30xa+battery+replacement PDF link annotation
    • https://cdn.sqhk.co/mofokamibe/hbsrOhj/creating_word_doc_template_indesign.pdfIn PDF document text
    • http://1xbet-regi.site/are_wire_haired_dachshunds_softug5q2.pdfIn PDF document text
    • http://bcipreactivaperu.com/vikas_apple_books_free_downloadwpzia.pdfIn PDF document text
    • https://kofetasug.weebly.com/uploads/1/3/0/8/130874362/zifoze.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/rudifafifanuxilolew.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/FXibhbC/34906942930.pdfIn PDF document text
    • http://nesobaka9.xyz/97168271801wx6tq.pdfIn PDF document text
    • http://passive-income.ru/forivunugipiliu5r4o.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/duderiwokonavetipo.pdfIn PDF document text
    • http://levantemosaic.com/94648239549l0u9g.pdfIn PDF document text
    • http://nazhivy.net/24878527386ml8zu.pdfIn PDF document text
    • https://wafitaweligu.weebly.com/uploads/1/3/4/5/134587259/66531.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/soda_stream_reviews_choicemsj23.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/uhjLcjf/napak.pdfIn PDF document text
    • http://vozogulizoje.iblogger.org/16491866020.pdfIn PDF document text
    • http://gutprod.xyz/vafakivapepitodexenufafrg64o.pdfIn PDF document text
    • http://social-whisper.ru/470168753165jaro.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://wadekazu.epizy.com/desired_salary_answer_for_first_job.pdfIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_061d6a2553ab471a9314a34ddb099e37.pdf?index=trueIn PDF document text
    • http://munakazoxan.epizy.com/dexok.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_b52109294a554540b84d0e0a8a98df75.pdf?index=trueIn PDF document text
    • http://sabejuxasatij.rf.gd/bba_llb_1st_semester_notes.pdfIn PDF document text
    • http://wemazepiba.epizy.com/agnus_dei_sheet_music_violin.pdfIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_c26c77a9d11b4a6f88bcbcd6cd0613d5.pdf?index=trueIn 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_off0000ed19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED19 5416 bytes
SHA-256: fd0886ef02f7368e93a86ac2248454bf03f2f9234924651feb0045b0458e8fb4
font_01_sfnt_off0000ff63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF63 10676 bytes
SHA-256: 34ca9bbd7ee66f76c9f59b3fa0daa019b2a981163cb9598a4e66eb1dfad7e8b9
font_02_sfnt_off00012402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12402 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e