Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0b14a11c6ef2da…

MALICIOUS

PDF

80.0 KB Created: 2021-03-25 01:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: eab7566b2a1eea604ff18edecd4a9a45 SHA-1: 50a90e04137826b44ff851d38e3167d6ef969267 SHA-256: 2a0b14a11c6ef2dab6103f309ceae71e44ed30ac77346d3c719a7b95ea80b7a9
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one pointing to 'maypoin.ru', suggesting it's part of a link farm designed to redirect users to potentially malicious content. The PDF structure and embedded URLs indicate a phishing or malware distribution attempt, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=b+tech+computer+science+syllabus+iit+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419198/normal_60326d10d886f.pdfIn PDF document text
    • http://rutomatuwusu.22web.org/aadhar_card_making_software_free.pdfIn PDF document text
    • https://zujuwaxi.weebly.com/uploads/1/3/5/3/135307850/d0eaf449016075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421957/normal_5ffda08ea0478.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/donemelarepe-tomutoto-dojaborisopalox-gibotedan.pdfIn PDF document text
    • http://nevoburaferivab.22web.org/como_es_una_foto_digitalizada.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/dd3c7198171493e.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/285d131.pdfIn PDF document text
    • https://mesukaxepa.weebly.com/uploads/1/3/4/7/134728578/mapokatijib-nugovululuje-keravorusak-sozixupevugoj.pdfIn PDF document text
    • https://divojalu.weebly.com/uploads/1/3/4/6/134664609/9547428.pdfIn PDF document text
    • https://vibofigejud.weebly.com/uploads/1/3/0/7/130740502/nakubum-tumipokowano-kefetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fd33a4cac7a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_601c6f4f811fe.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/5484250a-34e6-47e5-a4fa-574bcc844b64/fifemifuk.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/bengali_to_english_translation_practice.pdfIn PDF document text
    • http://zelibigevuloxuj.epizy.com/lomijelasamib.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/vaketil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d67461-1d47-4835-a694-3edd78380d2f/man_in_the_high_castle_book_show_differences.pdfIn PDF document text
    • http://ropipowewigu.epizy.com/ace_score_questionnaire.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/bivageloxopovuxinafow.pdfIn PDF document text
    • http://koxirekal.epizy.com/cuantos_ladrillos_caben_en_un_metro_cuadrado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e44ae7-3600-4bc7-b06a-374ea0dfbc38/14376816344.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB08 5688 bytes
SHA-256: f897d798220a12793411bef6a519f6cd7d756b8882215fc20d3193bf9ccc9c08
font_01_sfnt_off00010e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 10756 bytes
SHA-256: 2b1f9898efd1406c447e3a3b367f33a8ee1b420755ad0f89047dfe70645c04ac

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