Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeceadd4904f2db…

MALICIOUS

PDF

92.3 KB Created: 2021-02-15 13:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1c3a74c742a6d0d426fc7ae3e229aabb SHA-1: 94b321ead54a8ba83486ae114be36194b3f2ae5f SHA-256: 6eeceadd4904f2db78be2eb9566303e7a11aa06e928cff178d58197439644af2
186 Risk Score

Malware Insights

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

The PDF file was identified 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, characteristic of a link farm or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=buen+provecho+capitulo+7+vocabulario+1+answers PDF link annotation
    • https://masogivuxun.weebly.com/uploads/1/3/4/8/134887982/wuzugotaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_6009c6a144296.pdfIn PDF document text
    • https://gokuxevi.weebly.com/uploads/1/3/4/0/134017514/748306.pdfIn PDF document text
    • https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/6d5925d3244e.pdfIn PDF document text
    • http://dodemawaj.iblogger.org/pivukomoge.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/781099.pdfIn PDF document text
    • http://masito.space/the_conjuring_2_full_movie_download_in_hindi33ech.pdfIn PDF document text
    • http://taxilozevuj.iblogger.org/xebib.pdfIn PDF document text
    • http://digitalmedialit.com/crunchy_cheetos_nutrition_informationi0vh9.pdfIn PDF document text
    • http://eliyalte.com/badle_badle_lage_video_hdnhc70.pdfIn PDF document text
    • http://sunny-web.ru/32a_challan_form5oqyd.pdfIn PDF document text
    • https://feposejixadolo.weebly.com/uploads/1/3/4/7/134744373/xogadonutaj-zupobozigife.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/3383078.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/1298111.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://dejosabo.epizy.com/6350793809.pdfIn PDF document text
    • http://gojaxuga.epizy.com/angle_izer_template.pdfIn PDF document text
    • http://tajazenu.rf.gd/mozuvakemanamifedolafalo.pdfIn PDF document text
    • http://kiburomuwilun.epizy.com/the_backbenchers_series_free.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_off00011a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A29 5376 bytes
SHA-256: 4ae6efdce16e0a92eae270d4912debab521126e9ad5d84761d650f5df12fb9bd
font_01_sfnt_off00012c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7C 12068 bytes
SHA-256: 143ad3eeb6e2db0abad481b296b673dc5e38fda44647e00c2142c5a1f46c91f3
font_02_sfnt_off00015372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15372 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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