Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b111c9d33d826d3…

MALICIOUS

PDF

85.1 KB Created: 2021-08-12 11:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c34544eeb87889e5c646342d5bdac932 SHA-1: 196e4e4ba2fbda56373f29c7aba5c089b2f6f36b SHA-256: 1b111c9d33d826d320e1efd7b5ca162cffcb68550bacf5da47cbafa8fa08cf58
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document functions as a link farm, with numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm characteristics strongly suggests an intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/uplcv?utm_term=how+do+i+connect+my+dish+voice+remote+to+my+tv PDF link annotation
    • http://www.annaleehuber.com/content_files/file/mefivemuguvemuxozegigoze.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad334bffb2---27380122651.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/24367616482.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/97086006115.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/biwuguzibezewa.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f79a736178---99724212349.pdfIn PDF document text
    • https://iohrp.org/f_files/files/83979605526.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/65503051049.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/444ac59197e88af616ace7946767aa80/zoxorefatotuwetufes.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/60697913141.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/21683537522.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/fodisutukevamaxafox.pdfIn PDF document text
    • http://halaljones.com/uploads/files/43959274569.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2f6884709---14076070061.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b204df7dc12---denakivijasijaramodejuma.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/zowerepikoxotivusedije.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1a66509b65---bozinegorogugibajiworawo.pdfIn PDF document text
    • http://masonlegacy.org/clients/61515/File/jazosovidewejewo.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021061704163168.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dba2f8263f5---suzexajedasemuredofeju.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/lotosaloxatisu.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/97365346396.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/7998931791.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_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 17068 bytes
SHA-256: fd0985d3085f88d2571d6e7bb51774348191a01500b8cf129d62e2323ab0cc01
font_01_sfnt_off00011634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11634 10684 bytes
SHA-256: de5d30437257fa57448cc1c6dfeb318b81af9da5ee54051db383d35163ef6682
font_02_sfnt_off00012e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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