Malicious PDF — malware analysis report

Static analysis result for SHA-256 343ef4bbfcedcc7c…

MALICIOUS

PDF

74.0 KB Created: 2021-01-18 11:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 24b595201af27779f33ab336be7c30c4 SHA-1: 24fc28995bd24814a62ba69a1b1e50299831e216 SHA-256: 343ef4bbfcedcc7cb4e01e236c7f9f4869e67226ca86e1ced4ed33ee925d7c8c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wb?keyword=head%20soccer%20game%20unblocked PDF link annotation
    • https://bopetibalat.weebly.com/uploads/1/3/4/8/134891962/588870.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/9f78078ebc9d38.pdfIn PDF document text
    • https://site-1173807.mozfiles.com/files/1173807/bcbs_mn_managed_care_referral_form.pdfIn PDF document text
    • https://site-1185150.mozfiles.com/files/1185150/febonifiwinuvezifizino.pdfIn PDF document text
    • https://fajubixinusejeg.weebly.com/uploads/1/3/4/8/134850070/vutuxezigok.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/zibokagoxuvugeje.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/6b41f5087bb3.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/7747378.pdfIn PDF document text
    • https://bejazono.weebly.com/uploads/1/3/5/3/135315558/jupode_jegutawesewejud_vovozaxu.pdfIn PDF document text
    • https://site-1198644.mozfiles.com/files/1198644/68238874026.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/information_about_sir_cecil_spring_rice.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/paxifufugefujakupopo.pdfIn PDF document text
    • http://zujexig.epizy.com/53058652861.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/marriott_s_practical_electrocardiography_11th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/27109599617.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_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 5424 bytes
SHA-256: 680785e8865788f7f2fbb572fefad02c96bee4960589b145c94a7406bda2ea73
font_01_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 10224 bytes
SHA-256: 671ab4ddc4e5e76dfd5934471ae1e07eb372890999b19c04ff22c7b5d6e2dfc6

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