Malicious PDF — malware analysis report

Static analysis result for SHA-256 5703b1ae1e08cd0b…

MALICIOUS

PDF

98.4 KB Created: 2021-07-24 13:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7b074755ce81325b7fd28acecac9db0d SHA-1: e4a066215998d73b6b4081a5b0fe93a6c0e2f78d SHA-256: 5703b1ae1e08cd0be7c52c4d85bf84770e33e39d61551381039dd46529721942
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to multiple compromised websites, likely serving as a lure for users to download further malicious content. The presence of numerous distinct hosts and links suggests a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ed31e51e4---wufasinuwomuwas.pdf In PDF document text
    • http://wingmanresearch.com/userfiles/files/89902722724.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1vblu4lvpt746f5p4mk97proqv/nerinorivemejubodivoboner.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/sorimakenubogilovaz.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/mgq1vedepq7hq3dqicvjuu3ukv/67523365773.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/e61a0f09f6af6a952962448ef95ac797/filaxudemixaxuvabokop.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/59c0de34b9a024979598501f93253bdc/16441220781.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/4fc75c1766c1759ad78086f148938e89/5138758621.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/fokidoj.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/jakarivo.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afdc589bfd---miger.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f00435632---59260157499.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/1puldi5uo9dsap83p1pgjmiv80/28349291523.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/zevufuperijiwurumotiwu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/uj8cskj7rpm61spmsqkrjcaq36/megubimis.pdfIn PDF document text
    • http://emeat.ru/var/files/sowemu.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/74968047484.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/vhgc31o0a0nrkect5ipbvkd7q4/5101742461.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef8c420550---xufozakuliziso.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/1806147460.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bcba36d43---17441758839.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/uc1n0ilkh27s25rjj0ifh4fa0t/dugigesosux.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/70828345053.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/5be4009e4f07fc0db41eea12ca11b4cf/kojawamifevuxibozalepuro.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/7hq28k2aagl58fdcs3apk3tpo4/gititekuxukapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=free+download+showbox+apk+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 17536 bytes
SHA-256: fef926f7036ac68baf8fb7c56cab7a56cefc6afa500a6b2e6de330af88d4029c
font_01_sfnt_off000133b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B6 16204 bytes
SHA-256: 2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
font_02_sfnt_off00014968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001617f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1617F 10788 bytes
SHA-256: 070e429b778e6b6d072a26237e48a00f820e2537fe8f2e2fc9cc38936cfd973e