Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5214ed8bbe73a2c…

MALICIOUS

PDF

74.3 KB Created: 2021-09-13 13:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fc4be32fe5d9498ce750e77e863f10ed SHA-1: 0e45a4604dcad208c18ce73d926ab9aaa2a65864 SHA-256: c5214ed8bbe73a2c1404e4f75f0f4a86aba6bc9c32d5b6aacfb50e6aac6b8c1b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and a raw IP address link, indicating a strong intent to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI findings point towards a common attack pattern for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=how+to+remove+mock+location+on+android PDF link annotation
    • http://xn--eyt274i.com/upload/files/votaxafiluwupuno.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/dejexepufixosejekovaxos.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f24b4409a302a9a52b2a40b857e508b4/33690897811.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/mebako.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/mixivegapozolakafupala.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/fixewewijen.pdfIn PDF document text
    • http://posuni.com/userfiles/file/11446448306.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16133c28b7a518---85337273026.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/75725447350.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/xokozimizuxopuni.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/bizosaporabu.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/20132366656.pdfIn PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210912154954.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/32507827731.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/11212496085.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/32955575058.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/324612819.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c972b5cc65---49742250964.pdfPDF link annotation
    • http://centreforeffectivecoaching.com/media/file/61481560911.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/87809975166.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/rezozajakojexupusa.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/sivosanojifevimukife.pdfIn PDF document text
    • http://cycling-software.com/files/file/dotikokufagijuxoromexo.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/rapifoferedejizeketo.pdfIn PDF document text
    • http://hmed.vn/upload/files/220399474.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC146 16160 bytes
SHA-256: d3410307016640651eebebffa2d320c50dfe678ac425f4a229e00d3a46fcdcb4
font_01_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 10596 bytes
SHA-256: 9d0cfd3f1ad109a9a346d1ceaccad254b595f757303d73ba103b7fc25b927bfb