Malicious PDF — malware analysis report

Static analysis result for SHA-256 af19a16421b4500e…

MALICIOUS

PDF

85.5 KB Created: 2021-06-19 08:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1fb70224bd4e9f84d7ef214b1313cf73 SHA-1: 0544d1ee0cbaeafd8013abac43e7ec12082c5dff SHA-256: af19a16421b4500ebd1064f9ab3c800bceb7acd1a8fd161894efef29e4a98819
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites, acting as a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/uplcv?utm_term=rust+hapis+island+map PDF link annotation
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/jr9ojl29ncgp41udg5umlg4hpk/45206783645.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/65279192057.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076bcc55e691---89966800799.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a390368c---wusafebusalizasiterojuwun.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f91b08e05c---86892077097.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/qaq1e0a959qhdtjdsbbnac3858/vowuwafenato.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607df034a6f4b---junato.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071568d19561---lexeso.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/65116512674.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/efvpql58p2lq3qceqb5ndpbpa7/47384456076.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5cb619343a95dcbaccd2bd2a052c5254/gituluga.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/87855281672.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db8afdd42c---zenorukojil.pdfIn PDF document text
    • https://farstaslottsvik.nu/anvandarbilder/153/files/wisarokowobi.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/zilezilijifawuxuxunu.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/lufosun.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/39135593753.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/9353232542.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/913fd0e2629753a83f53131364770f1c/55195334859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 5108 bytes
SHA-256: e570760b55c6b2f587db060f3a6e3294c2bb2d9dc03e6f94ea4456acf7a4997c
font_01_sfnt_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 13052 bytes
SHA-256: b5eaa6519b0d177548fcba623247b06962b9bdd34e77a315f251dc55d40353da
font_02_sfnt_off000132b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B8 16412 bytes
SHA-256: 7d8c5f7abfeffc288e4307c52363b144433a8ce49aa4a24f353caebc547d2384

Open this report in the interactive analyzer, or submit your own file for analysis.