Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d4e731f43e4475…

MALICIOUS

PDF

76.7 KB Created: 2021-05-08 22:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ea468d2c0e0d1829bb305496bef1dc03 SHA-1: 7349e562aca8d4ff5215c2584ef1e23e67c6565b SHA-256: 04d4e731f43e447590460f1b375e3762933f8650422a11a68ea4f7370ee91822
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute further malicious content or phish users. The embedded URLs and the document's structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=is+the+2012+chevy+traverse+a+good+car PDF link annotation
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/8751753.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/steuererklrung_anlage_av_2020.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/apush_review_book.pdfIn PDF document text
    • https://dizegovonaziluz.weebly.com/uploads/1/3/4/8/134881707/sekanojosa-tusajidet.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/7heijce/hornblower_series_1_episode_4_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UXFgf8b/picshot_photo_editor_pic_collage_maker_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/gdgxeib/tafag.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/eggghha/funny_sounds_dogs_make.pdfIn PDF document text
    • https://sexeduju.weebly.com/uploads/1/3/5/3/135327292/lozagijelonexo_nemosomuwume_kijujibikekako.pdfIn PDF document text
    • https://pesirirovozag.weebly.com/uploads/1/3/4/3/134316115/8341201.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/ghpKMqp/the_sims_freeplay_cheats_unlimited_money_ios.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/daduta.pdfIn PDF document text
    • https://selijexobava.weebly.com/uploads/1/3/1/8/131856120/7439779.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/z9ierjd/sarogisopevabax.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/raxugolefojalujomidi.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/email_attachment_google_drive.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/3733021.pdfIn PDF document text
    • https://cdn.sqhk.co/jelazeneno/2QXiiHF/keset.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/xilirimaboro.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/how_do_i_get_serato_dj_pro_for_free.pdfIn PDF document text
    • https://pofofeteb.weebly.com/uploads/1/3/2/6/132681268/juzawase.pdfIn PDF document text
    • https://fimopoki.weebly.com/uploads/1/3/4/0/134040487/4616386.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/eSgHic4/31879037902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenares.myartsonline.com/surah_al_kahfi_100_110.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_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 5596 bytes
SHA-256: 2b8d0a66422a276136b8bc4bb07a8450a7a0649476ee37326d3747a0cf4c997c
font_01_sfnt_off00010040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 10924 bytes
SHA-256: f2f4d1418967d3761cd869e3b0496a177ddd7716e5e229625cb812229ab39877