Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa6be1d70c59e3d…

MALICIOUS

PDF

71.4 KB Created: 2021-10-01 07:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23232905456173b6c9f752e73ec62d9c SHA-1: d82f5df1c61b3f5450c73804fbeafebdb5503734 SHA-256: 7fa6be1d70c59e3defa846016d79ff4344ba2dd6848df1ebbd12bd1a691ea0a8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://clinton.abwingsmd.com/uploads/files/pozunosisu.pdf
    • http://sinosteelcode.com/filespath/files/20210903202009.pdf
    • http://orderkiwicafe.com/uploads/files/33657027341.pdf
    • https://virtrade.gr/userfiles_lybo/file/76633599413.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c8dd278840---84685379725.pdf
    • http://ablerexthailand.com/userfiles/files/wixatuwutuxepexanofifu.pdf
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/babevivimelilisedubopajuv.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/8bbiip6ok9e4eb8l54suhurk71/23682694415.pdf
    • http://tobn56.com/UpFiles/file/37296468032.pdf
    • https://csp-pub.com/stockages/files/16705832397.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134077373c8f---62338003305.pdf
    • https://pensionradvanice.cz/res/file/zugizukifagafusuvokadal.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8d5088a8930bd54b6893edc45c88b31f/89192555524.pdf
    • http://av-jet.ru/userfiles/file/jigoxuzalizotoxekipul.pdf
    • http://smenergy.kr/uploaded/file/168842769613310691e6c5.pdf
    • http://murielbellhomes.com/userfiles/files/68355621620.pdf
    • https://clicksnepal.grnca.org/img/files/files/vezuwisexafotegu.pdf
    • http://fazekaskozpont.hu/images/upload/file/6125112338.pdf
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/ruduxugopudabemegi.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147e1c5d7d3b---53995075444.pdf
    • http://baocaosuhoatoc.com/luutru/files/21001408939.pdf
    • http://leadershipcareer.kr/fckeditor/_upload/file/58120510494.pdf
    • https://altinhediyeler.com/calisma2/files/uploads/34250371277.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614076abed355---kimusa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=android+10+charging+sound
    • 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_off0000b4d3.bin
2af5fa925b41073d3302f20228a92e653b70cc796525f01dc088ca4ef99b17ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D3 10628 bytes
font_01_sfnt_off0000ccde.bin
3847b5e557f12c2c7b8ec954c32a0b73cda74e770123351b0048f8e98e1ce645
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDE 16956 bytes
font_02_sfnt_off0000f854.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF854 16792 bytes