Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e343cab4c12f86…

MALICIOUS

PDF

85.7 KB Created: 2021-09-24 02:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f1de6b67f7252a28ebcc64cd73940548 SHA-1: 465c2f0f79f891d6559b68c3668d3f67b7f92801 SHA-256: f8e343cab4c12f86a782d8796785fc21fe2cc372d2944635a91d1939d47b0136
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely contains instructions to decrypt a password-protected archive, a common tactic to evade gateway security. While no scripts were directly extracted, the presence of numerous URLs, some pointing to compromised CMS uploads and link farms, suggests a distribution mechanism for further malicious content. The PDF's structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/72290537860.pdf In PDF document text
    • https://girilawfirm.com/content_files/files/13183487725.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/kuwavikakerakudupipozun.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/nh9jmtqarlp5f4ro6rditl1kc2/fuxamatapagasejimusof.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/80302913814.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/norezijerobipas.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/betajigasokugikemuxubiz.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/xeradaj.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/tupijiguxu.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/dejezixitowofilivunego.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/71224cb974c3c1acb7e5de04ef34e96c/kinusexibowezi.pdfIn PDF document text
    • http://na3.it/misc/file/71772100174.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/22850434218.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/11572240100.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/japarozavado.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/56743008096.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/akddtlhi1635k46mmln2rqiuh7/50132977893.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5d256b72bed7e1d94f7ee786ffeb2ba8/76955166218.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/6td3g21fr09svpdq18ti282f8n/vuvugero.pdfIn PDF document text
    • http://dytac.hk/userfiles/bakajow.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210911_8199E981CF66B671.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/fodetepuromuwavedife.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/xogadagit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=send+file+pc+to+androidPDF 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_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 17224 bytes
SHA-256: 55e581c9ef79e3f1f211e60c1b2f90caedbd26129bf42f9bd82815f4291a8a16
font_01_sfnt_off000118fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13111 10520 bytes
SHA-256: edd1e8702c777bb9957834df03fc995af96f80192b41b0845cabe838356b350b

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