Malicious PDF — malware analysis report

Static analysis result for SHA-256 1914712aded9386b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 08:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3395ccea4b13a4e755eaae608bab9d20 SHA-1: dd86313bc5d5cae55b77fa6027b22f0f7fb24c61 SHA-256: 1914712aded9386b817cc7d5f01decf182c446dc251c20eb5c4542e2a201194a
156 Risk Score

Malware Insights

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

The PDF contains numerous URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns align with common tactics for distributing malicious content.

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://drafthe.ru/uplcv?utm_term=o2+internet+apn+einstellungen+android PDF link annotation
    • http://jinyezi.cn/upload/mepifepizimime.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a41c68413---87436782113.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/58109175413.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/gegexajomugoti.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16140cb86ca070---60385970349.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/gukidekezijimevafidev.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/wuvifumudevubexidexavodu.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/40170360780.pdfIn PDF document text
    • http://idcla.net/upload/files/47438711298.pdfIn PDF document text
    • http://keramann.ru/uploads/files/bemopasedipesi.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/pamuluguloditalenowapetan.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/27629647692.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/2ca2fd6023637b3b0740abe551ee5782/18947616483.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/jivofez.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/919de584a48dd8c5c4afeaf5b594061a/24123456931.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/tixafuzax.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/39329074076.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210909_045703_6445.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/vojivokogegud.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/35632489064.pdfIn PDF document text
    • http://atrsara.ir/resource/files/16284497883.pdfIn PDF document text
    • https://rt9.rspo.org/ckfinder/userfiles/files/35103729893.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://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_off0000d26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 18756 bytes
SHA-256: 0ef7e03ab8f0795f8f896a8beab827a6a109b81438eb53cddc3ee8555a5cafa8
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 10812 bytes
SHA-256: df5e7996a60a927b6a778d7974ecffbf3fc5d2a9199e289731be85826543b85e
font_02_sfnt_off00011bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1