Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1343cc39c7fcef9…

MALICIOUS

PDF

73.1 KB Created: 2021-03-22 10:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1a3d708f02568dee586a8c2fdb3aaaa3 SHA-1: ab2840fed80443d17ff4ae13d6cf107c4d274858 SHA-256: f1343cc39c7fcef942a62f69eec6eb1ffce3099142dffe8ebd99989ba02615ff
136 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it's an SEO redirector for phishing, pointing to the URL https://maypoin.ru/wix?keyword=bucks+and+barks+forestville. ClamAV also detected it as Pdf.Phishing.Trojan. The ML classifier output of 0.999254 further supports its malicious nature. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://maypoin.ru/wix?keyword=bucks+and+barks+forestville PDF link annotation
    • https://cdn.sqhk.co/daxonotetil/ieRDGij/import_stylesheet_html5.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/b3nRlzI/lebude.pdfIn PDF document text
    • http://fastgetme.online/dirt_devil_spot_scrubber_manual_espaolqlkfa.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/guide_for_pes_2017_pc_free_downloaddtzpw.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/EjiShin/conspiracy_palette_looks_easy.pdfIn PDF document text
    • http://tohld.in/is_baldurs_gate_dark_alliance_2_backwards_compatible6vxhg.pdfIn PDF document text
    • http://cardioactiveitalia.site/kukofekumadid7wfdh.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jhQeYRQ/dragon_god_of_war_chest.pdfIn PDF document text
    • http://izzzaaa.space/homelite_pressure_washer_oil_changemi14o.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/genwsjj/kipemoduxijofemexuvejid.pdfIn PDF document text
    • https://cdn.sqhk.co/bezifowo/aDnOid9/82580668469.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/af51b300-899a-40be-96c5-a3c5a81526dd/moog_sub_37_techno_patches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb64f78-e02f-4ae9-ba78-fc8764446e08/manual_de_funciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39151494-7089-46c5-a324-732f08afde3b/zupukerifopoleraka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4501f19-a4e2-4e32-8b16-18256312c2a5/71649112304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4af001fd-73ce-488a-9c24-ee11c6dcc545/mujiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76254c5d-1baf-4594-9d7c-2542494559b6/67979415300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953c43f9-d6e3-4365-9285-2b30bfae42aa/78254639671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b525b27-ac2f-45ff-bf7b-5471daff3404/gofakuwumijiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2feb2b9-a588-4454-92c5-a8668b5130ee/17276520094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2ae893-b893-47f9-970a-6ab5c545c662/muligegafapixes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbb24d0-7f08-4e3a-963f-6ca19e34b64f/36656872478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4712d74f-abba-4ce6-8e0f-e98e554f6323/naxiwasemunapijakezim.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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 5328 bytes
SHA-256: 0810345c6c23b3805e521dba6f1f1ee194b8c5af408be1463b1103995483c16d
font_01_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 11140 bytes
SHA-256: bb4659bcbb9e1e033c74594e959262ed667b968eb37f4f6cfda91af399d711b4