Malicious PDF — malware analysis report

Static analysis result for SHA-256 b723af214402c7ed…

MALICIOUS

PDF

88.3 KB Created: 2021-03-27 15:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b809dcb387bc349fa645d67c278d81fe SHA-1: 185fb9868b810d495d937ec417366b24ab6c9f28 SHA-256: b723af214402c7ed52268370b5bef951abf42985935ad4302a9e1d89369bb1e4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://botokaw.ru/wix?keyword=logo+modernism+pdf+online PDF link annotation
    • https://cdn.sqhk.co/nezuxada/zghid1q/tecnologias_de_la_informacion_en_mexico_2018.pdfIn PDF document text
    • http://accueilcmb.com/biology_the_dynamics_of_life_answer_key_chapter_4h3mx7.pdfIn PDF document text
    • http://sobakin.space/ronaldo_movie_2015_hindi_dubbed_downp2u3h.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/WUghger/games_offline_free_for_pc.pdfIn PDF document text
    • http://cleaner360.shop/83954390393hzer3.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/djvQgh6/fikanonotekiloxoxab.pdfIn PDF document text
    • http://zoompol.xyz/62498419973kmxvq.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/jbyXjjg/batman_the_telltale_series_switch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_536aaa43e564448e83fd390a5b370fc8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/riluruzelupovigowi.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_2dcbe024798e459ab1fbdb900e7a017c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/46391639473.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/are_del_monte_fruit_cups_gluten_free.pdfIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_4a924a4ee3d4461fb1ef5db52c634207.pdf?index=trueIn PDF document text
    • http://razogop.epizy.com/jasper_report_format_number.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/fidibeg.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/maya_angelou_birthday_cards.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_0b75af727f134008948f51121877ef19.pdf?index=trueIn PDF document text
    • http://xakitidopapav.epizy.com/84309091609.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_b5c942d7af6e47a9865aba03d19cf3ce.pdf?index=trueIn PDF document text
    • http://duvufewitopemaw.rf.gd/video_online_free_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/74121270469.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000128bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x128BB 18216 bytes
SHA-256: e2a1b2ad56060d9ee0534604706c90ca1c7ef798fee2369d0f5aaa0b34d32805
font_00_sfnt_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 4800 bytes
SHA-256: 39b4a07e15c6aff957ea29a4966ac2d2b88531ecfed29afed2456d51696be7d3
font_01_sfnt_off00010357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 10920 bytes
SHA-256: 3f4de0611a57cb738f4ce28e70cd9f7638b7fbc8542759c55711468b2d771f0c
font_03_sfnt_off0001453d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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