Malicious PDF — malware analysis report

Static analysis result for SHA-256 062ad831c08b0b30…

MALICIOUS

PDF

96.1 KB Created: 2021-06-27 03:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1a4bd02da2a2cea02b9f80840561dab SHA-1: d118e17f52c49e4ca5448ffec9c99d2b03a0935f SHA-256: 062ad831c08b0b3006ec00d4730bf6ff093a96658b2bfefbd0fcfe2daca61f3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm or phishing campaign. The PDF's structure and embedded URLs indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://synerhu.ru/uplcv?utm_term=story+of+fifty+shades+of+freed
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9aecdba56---45183439551.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdacbded1c1---95727607816.pdf
    • http://homeopathyhongkong.org/files/63830447247.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/36d74faa18ded69335232a08ddcba245/97977995583.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051314757_534109471.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/95dbd7c6b4c5a4a5a4df6762d3a38e69/lukuwiko.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad34c49dc---murosaragiwirasajoraz.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/24060420971.pdf
    • http://www.aluvascientific.com/UserFiles/file/61332947335.pdf
    • https://cncunse.com/d/files/58980862221.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ac4ca7868---20986024763.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9107fdeb36---medesujil.pdf
    • https://scalper.ir/data/files/file/jepowukenijujarugi.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f8875b3f---rezewavetezewe.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085b434bb058---rejobonaxuxevige.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a3b4c6994---fatowatagoketobibetexo.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/58075528507.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be14f0037fd---21855585892.pdf
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/8923530032.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/cd0d1edf1f60b8c6b6783e62cb706bab/11554806532.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090d45554033---61359329245.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ede47ee1e8---34637245920.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/53f0e75c81ded763e15852ae5694b534/pivapusisime.pdf
    • http://sartor.ru/upload/files/79844253496.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113df.bin
49d0ea806afdf0ea31a7d71ab36c2fd80554332e606ef3674adbaacd06bcdcda
pdf-font-stream PDF embedded font (sfnt) at offset 0x113DF 17460 bytes
font_01_sfnt_off0001418b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1418B 16792 bytes
font_02_sfnt_off000159a2.bin
11a6562dfa07ede6edbcceb13df4dd86a4be4babe9a35b99e2b6a8825ef91fbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x159A2 10492 bytes