Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b52b30912024d3…

MALICIOUS

PDF

82.7 KB Created: 2021-08-21 11:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f4799cf0034282ffcc98ff764f289b63 SHA-1: 7e92447066f67514178048cdc67ff009b6b65735 SHA-256: b0b52b30912024d3e867f2d6dcc84c475e2715b9bcd60ca16efa70e8fa7b2bab
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://aiswaryamatrimonials.com/fck_uploads/file/fonipadejokan.pdf In PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/08/02/petajovebipegarupum.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085362093318---67222738308.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/72110812037.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/9a0b6d2ff747c6f4d4ffdd4f9b458a4a/magupatolikidubufaladum.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/veminonovuvotovare.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c878dede69---33587763212.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///nanasali.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/tozatibizatenivuvuba.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/63465804471.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/wejijigixelazoz.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f681807ee---dakelelipuworazawewipinek.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/luxesumevedixag.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/sevanadovozivanazapogor.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/86051810324.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/20308334011.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/ganaja.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/zenozewal.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/jljvurk95qptlp5chaue8u1t2s/xabukebevoroziwokekizuza.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/sonitoli.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/gikasapemugomaja.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/47405958243.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072657e8f776---pakusufewute.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/q0h1gemb1ctef5s0gm1qait892/22608196270.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=who+am+i+elements+periodic+table+worksheet+answersPDF 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_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 17284 bytes
SHA-256: b2cf832ca1ced64976748973383bdffc30395a24333511b3c75abbf3c9c3283e
font_01_sfnt_off00010b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12356 11092 bytes
SHA-256: ff83e3b2e527bbc87f8804f56487ef2b6945cc80c39add2a9c0cc5c02a75649d