Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b46bfdcebe6ed0…

MALICIOUS

PDF

80.5 KB Created: 2021-01-21 16:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b58011ca5d13b509d5dae3c7a6783838 SHA-1: 7bbf3ac6ee2a8f4021d625f9a9c052095bb2cf9a SHA-256: 68b46bfdcebe6ed069651acecc756e9859a3bff81800b1ac25619fa99136a7cf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO abuse for malicious purposes. The ClamAV detection and ML classifier strongly indicate maliciousness. The presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic point to an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffset.ru/123?utm_term=secure+emergency+reporting+system PDF link annotation
    • https://wilasumoleliwu.weebly.com/uploads/1/3/1/4/131414134/mevavutejofufup.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/lovonapem.pdfIn PDF document text
    • https://munuliwakubife.weebly.com/uploads/1/3/1/6/131637312/4754865.pdfIn PDF document text
    • https://site-1199256.mozfiles.com/files/1199256/powutofoxetigidilojepow.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/6220375.pdfIn PDF document text
    • http://nefuzixitelu.iblogger.org/angle_relationships_in_circles_answer_key.pdfIn PDF document text
    • https://mokomopepu.weebly.com/uploads/1/3/5/3/135333670/lefexaket_lopuvisil_gikasofikoja_wizow.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/6911492.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/9843787.pdfIn PDF document text
    • https://wowevabesal.weebly.com/uploads/1/3/5/3/135322278/6886263.pdfIn PDF document text
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/1144713.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
    • https://s3.amazonaws.com/waduzirader/sticker_cutting_images.pdfIn PDF document text
    • http://pasivete.epizy.com/atomic_structure_worksheet_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/top_10_mod_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/nexofizuwoxotutaxine.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/vodoliwugizevosuluw.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/google_calendar_notifications_not_working_android_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/linux_centos_6._9_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/43635863820.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_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 5100 bytes
SHA-256: 8be868a3cff5f5ab8da0f928f272104f419bbe4c63895d1dccee3e3b8fb15aca
font_01_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 11220 bytes
SHA-256: 405c89efbd7cd8e82e4c8b30991426a6574fe809250073c5e1a3bff46c31e308
font_02_sfnt_off00012671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12671 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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