Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea506d7d5c5b61b9…

MALICIOUS

PDF

78.1 KB Created: 2021-03-20 03:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c72a4c3de974966870a9ce750c4d403b SHA-1: c42e28ecee7bea9c32aea32d7d694a40bad2e751 SHA-256: ea506d7d5c5b61b9923587484926b746054b8e9e5d8e32acba770d5f37ca40b0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=thesis+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454041/normal_603f7bcfe14aa.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/batgirl_symbol_template73p4x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_6013a39ac2537.pdfIn PDF document text
    • http://indital.fun/lodanudepoocbyu.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/dadurusamafetuwefet.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/onkyo_tx-nr515_arc_not_working.pdfIn PDF document text
    • http://save50it.pro/sports_classes_for_4_year_olds_near_me9tx2o.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/how_to_adjust_thermostat_on_electric_water_heater.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/how_do_i_reset_my_schlage_keypad_lock_without_code.pdfIn PDF document text
    • http://artyom.guru/how_many_ounces_is_a_large_sonic_shakehs1xz.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/27925805704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391649/normal_5ff4b65437330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_6023d463c8257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478383/normal_600c3b821987d.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/letibitademikupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6043e60729355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_6031f4d3d9ab1.pdfIn PDF document text
    • http://hdvideo.design/junoxitnafal.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/mililitros_a_gramos_mantequilla.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolirazebaf.myartsonline.com/celiac_diet.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/zibigeb.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/what_flag_has_a_rattlesnake_on_it.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/mary_rowlandson_a_narrative_of_the_captivity_quotes.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/24167170742.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_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 4992 bytes
SHA-256: 46d859736ef9ab2b536ff14765fd8d96ff2dca9acfedcef30e9144e52c06176f
font_01_sfnt_off00010774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10774 10308 bytes
SHA-256: 64d432908e3c71b7f542e3d614b3e2a4234e8d68928a3581f7314d6b4acfc002

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