Malicious PDF — malware analysis report

Static analysis result for SHA-256 02748e3ce1710946…

MALICIOUS

PDF

79.1 KB Created: 2021-09-04 06:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6672b506f99f026997bad7d9539d7ca9 SHA-1: 4c01522a3f98fc1bebaa6d6249e6dc455fd0f547 SHA-256: 02748e3ce1710946a1b49d0d5f7be0f919af519ee2a4dc21ee57a3d2891b2864
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The high ML score and ClamAV detection further support its malicious nature. The embedded URLs are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ketchas.ru/uplcv?utm_term=10th+class+sst+book+pdf+download
    • http://alrabbancapital.com/file/files/minikivotigojomewu.pdf
    • https://yukkumpulgroup1.com/contents//files/52611970541.pdf
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/bogawufosogejedofi.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a058d32672ddbeedd88e59f1deca4e38/5991518825.pdf
    • http://jjburgerut.com/uploads/files/44827785885.pdf
    • http://oaklandscreche.ie/userfiles/files/18449803166.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d07d548b57e---37806452293.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734115a940e---vamolofawesewotidisopo.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/0asg0qe59bc8baktc5u3nqj39f/81773043302.pdf
    • http://metapolar.hu/tmp/zixobesuxarupo.pdf
    • http://lt101shop.com/userfiles/files/gumaxewav.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822c78baec1---nozon.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/s8dd5qugiee8ilk7g3gh42n6t3/liwiviviwowedopes.pdf
    • https://krone-murten.ch/userfiles/files/babegosu.pdf
    • https://badeluxe.com/userfiles/files/57888958810.pdf
    • https://burkina-businessschool.com/business_school/uploads/file/89543337578.pdf
    • http://svatba-emi.com/uploads/pages/files/zijigikemofozuverojo.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607656fbc6563---woxubevomexifunave.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed944205aac---ximajovuj.pdf
    • https://dnsbp.com/all4help/fckuserfiles/file/nuwefevonap.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/fhk360pqebt6l2l588ihkmi7sa/63879131263.pdf
    • 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_off0000c859.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 16792 bytes
font_01_sfnt_off0000e06b.bin
cdad4cf5cc6c2c6086b2be0dde2b3e3578337b558162032390484b4f4e1925ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 21288 bytes
font_02_sfnt_off00011610.bin
124d6f7efdd1848ddd5829e6d4b29382a61557d83ebfb5eaf4615f9a8c9edf4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 10788 bytes