Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d154a851072251…

MALICIOUS

PDF

97.0 KB Created: 2021-07-01 00:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 382a99d00985e722651730062cfc2cd5 SHA-1: 71be065cbc08fd1d2f3a12e4074ede017aa7662d SHA-256: 34d154a851072251f4e6b5a5d6262a56f4ec4123b58b7e0372ecfeca2d9959dc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting PDF files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security scanning. No scripts were extracted from this sample, but the overall structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=free+event+management+website+templates+bootstrap PDF link annotation
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e34a5384a5---79089953259.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/1shf31faoeq1vh0g8k47ml2c00/tezitugumoka.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/waxex.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/240bb9224d1cbcaa85b0da79256657e4/44483508054.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/tinitanimatedelerikof.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160797915303cf---bigaw.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/moxurimedudonimus.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/dalaziporujafuzurazed.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083520181878---zavilefobefinixarenumibit.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/64cacef9cb97ab2bf20c2953072d05f8/saxazotaxalabikavowudulo.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-8/20210508181440816574.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/97381786478.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe6b67110---95720230042.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/3373ce5ea2e970c584bbe2106bcf1425/durozolurebifijo.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050821165680.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c16962a19d---85245246844.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/122fea658a4b0f2661d5f0ce84dd35c4/50981772523.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d86dcd1eb36---60400324317.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/ditevazaxevo.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/14837440999.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c41c8de61fc---bafobeg.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/84053007454.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001188f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188F 17284 bytes
SHA-256: 78d9be049b0293f8e438ff7aeda043a14388990bd258fc74b5b25638113b27e7
font_01_sfnt_off0001457d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457D 10864 bytes
SHA-256: 64545f16a477933067bd2c76c3234b3a686d07bd22a02a6495029a5b3f6be8c9
font_02_sfnt_off00015e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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