Malicious PDF — malware analysis report

Static analysis result for SHA-256 178c53141a43d35f…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 18:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: aad8a7a85c12dbe3161be6b0a8bdca29 SHA-1: 86c25767a1ca1800a5b9e8c6a5890e3103db3183 SHA-256: 178c53141a43d35fee684755951eb8743ae60fa0a562800e8a3bdb9cd2d204b7
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs, such as 'https://jottigo.ru/strik?utm_term=how+to+make+a+homemade+face+mask+recipe', are likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/strik?utm_term=how+to+make+a+homemade+face+mask+recipe PDF link annotation
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/1330017.pdfIn PDF document text
    • https://tatedugede.weebly.com/uploads/1/3/4/3/134311852/fanusuwanutiruz-joxafagipu-betetizizi-nivem.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/nowigofexeler.pdfIn PDF document text
    • http://intekzafast.online/57936258704853wq.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/renekur.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/petaxek_tozutagelotav_xopokafebif.pdfIn PDF document text
    • http://espacecmb.xyz/24691552428yq30a.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/powered_by_the_apocalypse_cyberpunk4jn5e.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/morir_fuvodezon_lalobatotafolit.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/8ggwdAs/skater_boy_lyrics.pdfIn PDF document text
    • http://delinapod.mypressonline.com/vatubolafunivanemasi.pdfIn PDF document text
    • http://hisgohar.site/where_are_you_going_in_spanish_formalfcd2o.pdfIn PDF document text
    • http://gasomenuza.iblogger.org/vekozonavomijer.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/942554.pdfIn PDF document text
    • http://pro-komp-master.website/vexotuburesua9nle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopebewi.epizy.com/shield_wwe_theme_song.pdfIn PDF document text
    • http://tafoboverel.epizy.com/piano_music_sheets_free_for_beginners.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_off0000e43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 5480 bytes
SHA-256: 86adc85e5e0e16a06a52a4bd219116b41bcfd9dc671bb2523403e2f8960780a9
font_01_sfnt_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 10168 bytes
SHA-256: 2dc060d5b852ece404515b2b2c8f22a0d6fcc228a61044ee2191b67b68347b2e

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