Malicious PDF — malware analysis report

Static analysis result for SHA-256 268b1bedc304a0e1…

MALICIOUS

PDF

75.5 KB Created: 2021-09-05 17:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7e5dc2805d22d595210039c4a8287491 SHA-1: 227ed1190603c911e29507a2f9fbddbcdfb0793a SHA-256: 268b1bedc304a0e1944eb1b3c406e07ad1b562a338467a6b1dd1805f937d4478
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to PDFs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs clearly point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45f1f39da---13623792324.pdf In PDF document text
    • http://alnadaoil.com/userfiles/file/lojewevuvenamenedugija.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/42495365198.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/vosarafopegapibuvemegote.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/87731965888.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/378d00338c4576f7044fb3c6a9a45d7e/vixijirokuxider.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/64d8b1ffe56a9a1780254f6e954f7e92/17511630719.pdfIn PDF document text
    • http://clarasonic.com/upload/file/fobonesinabuj.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608948ac9d8d2---notukoxazem.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/1hgsmngo9m2dbg31h06bbqv9ku/neniguwobi.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/45474273962.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/pupomegasorewogezeso.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/xaroz.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/72f63b6ad54cd509b3d65d3953891256/72381612904.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083947b80cb4---37576155178.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/94658041691.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cbdcc5260---vagigagavegovokumomov.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/62912201710.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210510052313.pdfIn PDF document text
    • http://rapet.hu/files/74317125865.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863ef716113---7391070243.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/68041921032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=free+simple+english+story+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31F 10876 bytes
SHA-256: 1cd5f15ddd339fb23769d2e6786da513aef8a93a6b9df274bc6931b9d5771a72
font_01_sfnt_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 17372 bytes
SHA-256: c4dacb38d2bdc4d1ffd45ab22028832ce3e75743c94d3f43c735ce10786a2eb2
font_02_sfnt_off0001087b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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