Malicious PDF — malware analysis report

Static analysis result for SHA-256 48834fbb675dc61d…

MALICIOUS

PDF

90.7 KB Created: 2021-07-02 16:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 357d1c13e65902a9cb8d01fa898cb377 SHA-1: a1b69da4f4d9c63ed6ca8bb9feaef0ae8f69259a SHA-256: 48834fbb675dc61d54d2a14d9168acfbc039fbaae27500df5731f505264b62a4
196 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics as an advance-fee scam lure, indicating a phishing attempt. It contains numerous links to external PDF files, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://xn--or3bi2da319p.com/upload/fckeditor/file/gageb.pdf
    • https://windsbs.biz/files/file/pumokuluj.pdf
    • https://summit-christian-academy.net/scauserfiles/files/togevepugu.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608392b7f1774---76771814552.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/82233508734.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609c35cebd79e---zovuritapumijabumobiwi.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/dd1b9471e711ba64e9d0230380451196/pivekifugopebumu.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5336987aa---82868078842.pdf
    • http://paulsaperstein.com/userfiles/files/62168118275.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17d05c64a---duvesenusu.pdf
    • http://chronocertif.com/userfiles/file/17460145976.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/7j40a9n5ri1qmnp7mc4b6och1i/loredogusuwakexusibagewap.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/570e9fc1d67c19c1e10b1955ce503ab2/2805172439.pdf
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/14767850140.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e369203c40---8152061587.pdf
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/24357427566.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094d46f3a3d1---23357569599.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/e84e04ddb85a552c3d82bfb32e154c1b/vepivopiloven.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbe49a7ea4---totunep.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/55b94f473beafe9b9751cb6f8e54496d/90707676771.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/193a70558c4b9f8270a76ca4e8dbb16a/bibegifupatepanelav.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdf66603d2---87471985787.pdf
    • https://agentcctv.com/userfiles/file/14947142909.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=nba+jam+apk+free+download+full+version+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd5b.bin
dbaa01da45d926c75c5700ed72c40c14ac0affd159c9ea55ffdc61ff53758045
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 16992 bytes
font_01_sfnt_off0001295b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1295B 16792 bytes
font_02_sfnt_off00014172.bin
b9be8c9271d1f163a8a7532653a4eeeeb028c364b334203a8110e6e5f4d5e052
pdf-font-stream PDF embedded font (sfnt) at offset 0x14172 11152 bytes