Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fce5738b85e435…

MALICIOUS

PDF

71.4 KB Created: 2021-09-03 21:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c2a24832f3740b2677306905a5531c48 SHA-1: 0575992010e1070de963d8cc06cab7e3927b17d3 SHA-256: a9fce5738b85e4353574e2bcd6137d3c0daa075ee0327c14efd225e1696a455d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or scam campaign, indicated by the presence of a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 http://piazzademarini3ge.com/userfiles/files/zisonejiripidotirex.pdf In PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/99460875146.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/zamilofopuzed.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/32e5fd58d7fd5a48e9721ac2aea11909/99495615415.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/20523759423.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3a95ad5fe85bda6150e864aa1ce8b108/porugobonuvunejur.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/98587519465.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609adb97d3bec---lutadilisene.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/jetufasazonagevulew.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/73519695891.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160752c80dc9b8---67592654304.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/japutezokagewisisezeduvi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/5df53c906fb265087af9a2d970d71eda/23585872413.pdfIn PDF document text
    • http://charivne.info/images/file/feseperorupirumigovifomaw.pdfIn PDF document text
    • http://fkhd.cz/data/img/45639106389.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/94798505006.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/7178242379.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-30/20210430201101382520.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/4518f78eb17c767bcecf6d7f60a98d59/zijem.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/70752451635.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/19576474031.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/289e93ab74bb0a96389976faf623a71e/69013312350.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/mupaduwewapoxilaw.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/79827437160.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/zefutobedogoparuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sbi+clerk+notification+2019+pdf+state+wise+vacanciesPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/18810189034.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_off0000b3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FE 15676 bytes
SHA-256: 234a993f3c9d864ddb23406f41025ac59913ed1c14956d77b314abfa158f79ce
font_01_sfnt_off0000dc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 11536 bytes
SHA-256: bfa75ad4c7183806b05c63b7c8de3db72a902d46b322b6637b085a3751d9396a

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