Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc867a60c533da3…

MALICIOUS

PDF

82.5 KB Created: 2021-03-10 06:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ad100cf9260a5c74863015fe03718272 SHA-1: 76f63ee912d344ab5fd884439aa3c1292735c0d0 SHA-256: 1cc867a60c533da34b1af89034420f99eb71efc63fb49a0c19b4f68bddb11f34
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=does+netflix+have+fresh+off+the+boat PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445889/normal_5fef0a24aa00e.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/82913665440.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/5765891.pdfIn PDF document text
    • http://doxigedugovo.22web.org/free_pictograph_worksheets_for_second_grade.pdfIn PDF document text
    • http://tizigigukaj.22web.org/31178906070.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/aprendizajes_clave_para_tercer_grado_de_primaria.pdfIn PDF document text
    • http://wivejudotimog.22web.org/53753701231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5fe6544f63e92.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/vigenukuferulet.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/decca4eea9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5fd26149b6b90.pdfIn PDF document text
    • https://negowuvezesat.weebly.com/uploads/1/3/4/8/134859399/9476099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_a0c74851517e4bb0983bdc08f3354b0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/80682884569.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/espaa_siglo_xix_6_primaria.pdfIn PDF document text
    • http://pikowejinaruwut.rf.gd/jibinazijogazefurona.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/arizona_cardinals_injury_report_week_5.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/nukumajawokine.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/24495244942.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/aa_one_day_at_a_time_quotes.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/did_elena_and_damon_die_at_the_end_of_vampire_diaries.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/41723087290.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_c1189e3c1ae6442f8b2fb25bd58c5edc.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_0d09859b09b0485a92f08aa7a8fe8254.pdf?index=trueIn PDF document text
    • http://juwukopegonamu.onlinewebshop.net/92061670154.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C6 5120 bytes
SHA-256: 5ee77352020fca8fe9808ae21f89236788dabfb13fe78807e110dbf9553ad9a2
font_01_sfnt_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 11524 bytes
SHA-256: 84f56649ce3d8475b37e4489958cf2f24be2c2759087a93e257fd20748145fb6

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