Malicious PDF — malware analysis report

Static analysis result for SHA-256 24698e3c822c0dc9…

MALICIOUS

PDF

83.1 KB Created: 2021-09-01 19:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d46ee6236eb041829dfb3e3b06f65c74 SHA-1: eb2f9d7a71628104c13c6111decaa136b1334372 SHA-256: 24698e3c822c0dc9efdc712bf353d81d9571c6d328b3c3a914306cc7087e279b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/d41bca37e9c8fe2824546689d56e0ce5/mebasaroxorunafadetedox.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948406bbbda---25199594185.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021060521453773499.pdfIn PDF document text
    • https://medtek.vn/storage/file/zorilefinawajonokudan.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/didarovatexasilusowi.pdfIn PDF document text
    • https://maturana.cl/upload/file/810024441.pdfIn PDF document text
    • http://ccadl.com/files/20210724161238.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/af905d97f3e1a63be05b561c71740e97/zovemuxafutorarowime.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/61586455904.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/88f9d3cb3c6f47277d74ba1dd21e6075/43544626331.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/g4ihmf233p8km1fjkubgugq7d5/marugujavasakaxab.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/39a33f613151565425248818c6f52dab/majunosidimejibadirup.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/53826304645.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/p9suufvtg0htm25k8cagjum3h6/99361449128.pdfIn PDF document text
    • https://oversaslogistica.it/file/loferedirapuwupupir.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/62763331771.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/0minv195m3m4a0u1jtb63q3kc3/69090791124.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1aefc04c07---91829381132.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128e4a8bc87f---61681284566.pdfIn PDF document text
    • https://seerupit.dk/assens/file/wuxiram.pdfIn PDF document text
    • http://hevolta.com/upload/file/92883316370.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/binigunixujegumikex.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/51823549625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=probability+of+a+given+b+complementPDF link annotation
    • 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_off0000dc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5E 18280 bytes
SHA-256: 4bead5d3592d56ff72470b26d9a2fff53bf144dc892776ff742e16c42111317d
font_01_sfnt_off00010c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 10976 bytes
SHA-256: c99c688d78d52f9255394832badc0a5d609c04057bf591f855ece6dc777a2d5d
font_02_sfnt_off00012563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12563 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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