Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8ed1667ddd37b2…

MALICIOUS

PDF

71.7 KB Created: 2021-03-10 04:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3f6e996dda9efdd81cb9d00a875a9e0b SHA-1: e7a4fb43b41e4f85b414fa682cd736b110ab4f2f SHA-256: 9e8ed1667ddd37b2eb39f3b4062700656fe38d5c25da7b1dccf2078c7e5d6138
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirectors and link farms, indicating a malicious intent to direct users to potentially harmful websites. The ML classifier and ClamAV detection strongly suggest malicious content, likely phishing or spam. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/aws?utm_term=biblia+catolica+de+jerusalen+gratis+pdf In PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/razurikamoxegedamebo.pdfIn PDF document text
    • https://konimekinera.weebly.com/uploads/1/3/4/4/134444166/9961376.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/jelovasemofa_puzeduwodad_dewuzesuxozupum.pdfIn PDF document text
    • https://doxifivot.weebly.com/uploads/1/3/4/2/134235468/fuboxo-xolul-gazebumoga.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/tidusotixizi.pdfIn PDF document text
    • https://tadiseregofinu.weebly.com/uploads/1/3/4/7/134748358/tigugudore_sozudupex_xetiwebavix.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/repatazoboru.pdfIn PDF document text
    • https://linikakisevokeg.weebly.com/uploads/1/3/6/0/136098208/f0bef288f.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/lonire_diwimokopuxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vokeri/mevakisub.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_03691b0cfae14608a3e39fce455c61b5.pdf?index=trueIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_b7c3996fab8d43009e62b9996106ae39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/nobisupuli.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/97145924923.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_cd534de05c2946debd5d46165fc581e4.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_a6cd3186a6a747ddb0d23eb5b2c2dbb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gitipelut/nice_guidelines_weight_loss_medication.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_4bb258cd34ba490aabb48d0c38373dbc.pdf?index=trueIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_6a6037efbb08463bad8b89512c7a5705.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/apache_poi_api_jar_files.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/samakesexegozodetakemer.pdfIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_b69ac2fa83ef49e2a05de5909b76c417.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/75613137744.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_4c7e6a66e21e407b95e468c291adc79d.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_0ef2ac8b81ef417c9d68b372874fa14e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekife/air_fighters_mod_apk_android_1.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_off0000d874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 5588 bytes
SHA-256: aee54397e34bc3e3bb3f2e73858ae5a48e2a390c9c606d90e80744825906fd49
font_01_sfnt_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 11100 bytes
SHA-256: fec8187d2c455b1cdcddcd74830943dcab108d95e6279421a77b4a9747ac4aa1

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