Malicious PDF — malware analysis report

Static analysis result for SHA-256 980abf1e05be0c8b…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 14:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 30dcdd6524dc63faabb44b1de7b77c8e SHA-1: b886554c29a6eebd497e2cf7f4cbeb6b899e08a7 SHA-256: 980abf1e05be0c8b127c4d671ededf58ccfce5953e63f0eb6b37e1a819d82e01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting an attempt to leverage these sites for hosting malicious content or for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d40fcafaf9---85187917429.pdf In PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/61321535888.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/lewawidalipinogur.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106517558ade---16517598416.pdfIn PDF document text
    • http://darec.sk/files/files/jetawikejitivupekosubov.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/619286808.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7424e3e04---nivuweber.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/5499066652.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a698c43b757---bokeraru.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210602012351.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/pezixizewuguguxunodem.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/36899235937.pdfIn PDF document text
    • http://clase86marista.com/clients/25276/File/worutuzatoroxatudadar.pdfIn PDF document text
    • https://kuepancong.com/contents//files/ninitadatavixegaletoli.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/hkqo256knur29glc5ko9ts2bu4/97139119750.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/r55gbnss8bgdjl9eqkjj99dkg0/kalifutizijel.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/72950165407.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/30978216754.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/sepiri.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/3711653113.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/duwubexuzidodaforulaj.pdfIn PDF document text
    • http://bwc.lt/i/5080363188.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/67981059173.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/jenizosinokoteze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+meaning+of+harshPDF 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_off0000d2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 22744 bytes
SHA-256: e415acfb58ec6ddf72123acc278354b457226f5c980ce633a4643b12988e4cf4
font_01_sfnt_off00010d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12532 10480 bytes
SHA-256: 4bfe9b42c4643e974bf49c073e883af816a05c753fa42fc32da32decfb21af80