Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cdee792730fd6b…

MALICIOUS

PDF

103.5 KB Created: 2021-06-26 00:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 795719df83d4ae183ddc42bb91740329 SHA-1: 1c50f61e5583a20a83245fda3a460dc6faca9121 SHA-256: 70cdee792730fd6b491d1ce99996162e04220d312e3325f1c8dd35eb9de88e70
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a common malicious PDF tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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 https://archism.ru/uplcv?utm_term=ap+stats+1997+multiple+choice+answers PDF link annotation
    • http://aksaaydinlatma.com/img/editor/image/file/12708085335.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ae2fa973136fafac79f6c62aa4a9e627/renesireg.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/32245596494.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/1b4dflt09n8q7llrhselkov530/12662022802.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609947fc1a499---muluripibov.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b059a14c43---44354296677.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1181dd7fb---68791969349.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/bf4034c883a6f1e19c338614c56a90b5/12780882613.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/tiradadetejizulapow.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/23693994191.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/37fd0054b547f597ec9daae888171b70/2179656484.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/ragafixetatup.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/1aab2fe515a41b53cf783771989c5633/38116341769.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/94822126424.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/dotulutas.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/gifobezid.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a91155caf27---semosudijejo.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/watimisexo.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/p3rkvs2ddscefaepvv0445eq6v/bopememakujukesan.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082561e13e87---26372547363.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/25727956309.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ee91a20446d9db7a8fd89bab82d3aa1b/56922305027.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/q0j4t5jelftom3uh7ble74s34m/43081037362.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 23292 bytes
SHA-256: 62aaeb29d3e82b7974575c8c7b19376468eefa248f523ab915651d5c6a342dea
font_01_sfnt_off00013a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15295 16284 bytes
SHA-256: e605bd69985f71880ebd305c6fa60467ef97f953512ccb44ddee9202b0740d3b
font_03_sfnt_off000168a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168A2 2720 bytes
SHA-256: f0c5fa9495e635d98b56e364a01353c8d18c62e1e469a71522cc5a42d0f0772c
font_04_sfnt_off000173fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173FC 11076 bytes
SHA-256: abd225ff0af5def73a74c848ef68b7a0086bfea767fbf678086b3ffa99e5d3c8

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