Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdd2e9258c0b4a1…

MALICIOUS

PDF

85.5 KB Created: 2021-07-08 19:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ea4b7b74d2e200b8fe43301231e2580f SHA-1: 057ef430c70c31e6a50815c4881e982575f19e68 SHA-256: abdd2e9258c0b4a1636e9035fb1debe5e547737b4e8e090e7117bf864839c7b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. Although no scripts were directly extracted, the nature of the links and the detection indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a09606caa924c41919e9be8f052257b2/zoganosiradenij.pdf In PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/20f1c556169eef274c5f295f40a9f488/54297620668.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec3484749b---luzifegitimufir.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9218dd4b5---48544152060.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/j5b35gghj975qtksqnvn95tiq5/17946952043.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/94701636500.pdfIn PDF document text
    • https://arerp.kr/data/file///44982006277.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/zisugubujovakolub.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70bffc63ed---perebexomekalujaz.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/83093939913.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd869605e2---pikodabuxunebumobezi.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609da414054a3---widumepiguxonafiri.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459982d532---85265972598.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f9b7616159f463d67ff17d1b7e435588/lipuxidim.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16072f4209523b---96546773264.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/87188986615.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e03ade5d562339293d944cb20b5619c3/vobatutagozurujijuzu.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/97ejktpjfvp8eo21sm9iahhno3/keperidalokavu.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/g59m3a688p4hvo1jrga6i9rl5b/bojuvowijazuxizufoxapu.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095fd567942d---64079221249.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/54053933735.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608709e313b2d---87688984769.pdfIn PDF document text
    • http://budka39.ru/files/jinivevunakilulub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=respect+your+elders+meaningPDF link annotation
    • 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_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 17996 bytes
SHA-256: b3b0618e13015438c9111e8cdc0ca119dcc4920b8cb83b9b23ac87632d9b4166
font_01_sfnt_off000116df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF6 11116 bytes
SHA-256: 8c79e05748887b8de4fbd8f5f588535ff6307fbb2bd17a2cc777bed2bac12286

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