Malicious PDF — malware analysis report

Static analysis result for SHA-256 6beabf32ef7f7b01…

MALICIOUS

PDF

76.8 KB Created: 2021-02-16 03:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a3dc0c2a016ca7d20e6c05b514f2cd5d SHA-1: d623e849596afacebe02fa2edcddcd06cd1b97a3 SHA-256: 6beabf32ef7f7b01a3d3b7f3550d98f94863f88daa2ed7269dbd83e2ae176d1b
66 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains an embedded URL that redirects to a link farm, which in turn points to a PDF hosted on disposable infrastructure. The document body text appears to be a garbled search result snippet, likely intended to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URIs and the link farm heuristic suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://bologen.ru/strik?utm_term=majestic+gas+fireplace+blower+installation PDF link annotation
    • http://xeresorejal.iblogger.org/dreamweaver_template_syntax.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/paberi_mejar_saxuvini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393759/normal_6009372f1c827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366327/normal_60072d2479dd4.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/wuxalefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_6029cfe5d371b.pdfIn PDF document text
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/5ac0f3610b.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://podifugugak.epizy.com/12289189778.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/97324733568.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/sires.pdfIn PDF document text
    • http://timadulikojig.rf.gd/consonant_vowel_blends_worksheets_for_kindergarten.pdfIn PDF document text
    • http://sevojaninap.rf.gd/chopin_24_preludes_op_28_sheet_music.pdfIn PDF document text
    • http://rosukijabadizi.epizy.com/tarowodiluzaxuboganagere.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/75989756915.pdfIn PDF document text
    • http://kubazemaxem.epizy.com/hand_in_notice_letter_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE159 5284 bytes
SHA-256: ec68c2ae741421012b20bb363d03b1f900cd0465894276b54d94651dedc2fbd9
font_01_sfnt_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 10652 bytes
SHA-256: cf0b94e50fe13a2e7dcc48480481f47b1b0b0aae68774a9e5b643ab4c894c2c7
font_02_sfnt_off00011805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11805 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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