Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bcd511083fb932…

MALICIOUS

PDF

86.4 KB Created: 2022-04-05 01:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: cb547e5501fbfe12cc42dcd2a96687e9 SHA-1: ca0ebbde899fb5e453feb1f37ea67737b52cee32 SHA-256: 88bcd511083fb9321c6286ae4fc101c069f042acc70019e9343d453eeab6f79c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://norin.co.za/YmrXLWy8?keyword=best%20harry%20potter%20lego%20sets%202019 PDF link annotation
    • http://www.assistvaleur.co.jp/inc/kcfinder/upload/files/6862171173.pdfIn PDF document text
    • https://fodewifejala.weebly.com/uploads/1/3/4/4/134491976/bukenuziliwixasawi.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/8287143.pdfIn PDF document text
    • https://wudowesowuzoka.weebly.com/uploads/1/3/4/5/134584143/kikevu.pdfIn PDF document text
    • https://dobry-styl.pl/web/uploads/files/42016381254.pdfIn PDF document text
    • http://japhina.com/upload/file/fazawasujun.pdfIn PDF document text
    • https://jinidodax.weebly.com/uploads/1/3/0/9/130969434/jevuwisesixe.pdfIn PDF document text
    • https://lijanitog.weebly.com/uploads/1/3/5/3/135309202/13963dcc673.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/54142377685.pdfIn PDF document text
    • http://niuwa6.com/userfiles/file/24492577906.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/78451119723.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/8urdoqm80ghsgu1bnfbr827hk4/vanosugilagonumuzi.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/namizuxiwa-xigekiraloli.pdfIn PDF document text
    • https://bolafuba.weebly.com/uploads/1/3/4/6/134668532/riruxinu.pdfIn PDF document text
    • http://shengen-viza39.ru/media/files/sefafelakatuputarobuvi.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/gatumatolotapirig.pdfIn PDF document text
    • https://camelcarpet.org/d/files/kalajifatonoduruboviguje.pdfIn PDF document text
    • https://rutizinudepedo.weebly.com/uploads/1/3/4/4/134483735/rogarefu_niwawavijeromis_vomajefabis.pdfIn PDF document text
    • http://conepe.org.br/public/ckeditor/kcfinder/upload/files/veluxodokapi.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/pemaw.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/52056892204.pdfIn PDF document text
    • http://hosma.net/upload/files/58268427904.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/8121371.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/metarom.pdfIn PDF document text
    • https://officia.tn/file/93746980962.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 extracted file (font_00_sfnt_off0000ecd1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ecd1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 10964 bytes
SHA-256: de6667a53d9e250c9a8636d2d8301d9042391c9f1a687fbd2d30011422959bb1
font_01_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 17316 bytes
SHA-256: 7f59a89c951a653c24501e5792da8104049e82fb16f7006cec270cf0c6dad693
font_02_sfnt_off000133c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1