Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c47773062e0eb71…

MALICIOUS

PDF

79.3 KB Created: 2021-08-30 14:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 03547db646bd7c6393d83196c92bca94 SHA-1: 6aece0c8b35d9d546c824c65ac01a53dc73658b6 SHA-256: 9c47773062e0eb71ab7431b52657c25947b39317aa0df5ba3e3b61b719bea98d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress sites or disposable domains, indicating a likely phishing or spam distribution campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or further stages of infection. No scripts were extracted, but the numerous URLs serve as the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://philabc.ru/uplcv?utm_term=operations+with+functions+practice PDF link annotation
    • https://arhstroi.by/uploads/files/mimezi.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/wuxerojobudulevafogisuda.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/52024369172.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6680b1cc7---gepadobegolobatux.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f6a87f78234---13144772821.pdfIn PDF document text
    • https://goldenapp.net/file/suxifolazo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a9e677bfaef4b223ec54afaf96da8db1/tiwipobodonitepukomitozom.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/51005777481.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50fb66a6fd.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/40b7431e09e2a02901703832dfcc12cc/54137910880.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff55acbc9b---ziwoxebawivenilotupimef.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/7839b37acc3d24a65faefe8f985b4f6a/86132557080.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/xamixadenuraru.pdfIn PDF document text
    • http://dentherapia.hu/files/file/lisixi.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/dehdijc212hdi2hrmc8eani1n4/levujozaki.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/jesenuligezimov.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210625_187D6E48CB47AF69.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe2b62b3d---5604516975.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/e07377341996a399fec5a7f6bcc7b1cc/zexopurabisuwotidovojiri.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8af689c2c0---72066723510.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210513023004930.pdfIn PDF document text
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/nizojovinatobojagiwum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3C 14500 bytes
SHA-256: 24f8c6c11ca4436f91cd30b5cd1a3420ab44698438dee2cff3e23b822bc0aae1
font_01_sfnt_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 17804 bytes
SHA-256: 43787e5e0fdffef595f00741e107c9d4611521468be80c22854410827671e06a
font_03_sfnt_off000114fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FB 10740 bytes
SHA-256: 7d299869a55c084229787c39008b3e66c61c67fbd5fc54ae6b3c29537ac52c56

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