Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c333e9063a4606a…

MALICIOUS

PDF

86.8 KB Created: 2021-03-28 14:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a3c7a17a3cf9e7b4a80bc37a01f519d SHA-1: 90c14c12b964c1e405776acbbab8557595634724 SHA-256: 1c333e9063a4606a9efdc8c7bdffe9143dc2ed6ddf1d72035ac92a81392a17dc
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9989

Heuristics 4

  • 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://midufefew.ru/wix?keyword=2003+saturn+ion+manual+transmission PDF link annotation
    • https://cdn.sqhk.co/nivavepe/ctjjWov/lovoj.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/kamala_das_introduction_poem.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/Yyii9li/bahubali_part_2_full_movie_tamil.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/xulinif.pdfIn PDF document text
    • http://aicberg.net/organelos_de_una_celula_animal65s9b.pdfIn PDF document text
    • http://wipebodu.mypressonline.com/kudemakivoli.pdfIn PDF document text
    • https://repugololenip.weebly.com/uploads/1/3/4/8/134880500/gunuxupan.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalamin/hhibgj5/soccer_manager_apk_android_download.pdfIn PDF document text
    • http://reduslim-italy.site/fidupascpohk.pdfIn PDF document text
    • http://creamwalls.online/4011664093137au0.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/geibhcy/93753814215.pdfIn PDF document text
    • http://gufutaca1.xyz/aur_aahista_kijiye_baatein_whatsapp_status6fogl.pdfIn PDF document text
    • https://cdn.sqhk.co/rapedipular/Tiazijo/phage_the_untouchable_edh.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/historia_del_genero_narrativo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_12e59d06d42a4466a525ea653e332363.pdf?index=trueIn PDF document text
    • http://nononulavojiki.myartsonline.com/76894800351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e542a8-b671-4ace-ab44-e1d28af9f4de/sri_rudram_mahanyasam_telugu.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/vezilolefofimatabosez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce82731e-af26-4ce8-a35e-2304bbf193e6/tusoxemixaw.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_977d625961f840b9ad62a12ee8ae68fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a863a4-518b-4f2c-9b2a-c0e649a40787/42775127813.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_52ace854832e4f249c2777791c7aac82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/649c5ecd-3d18-4b67-9838-6b9caef2c697/will_dispute_lawyers_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d303fed9-259b-47d9-a47a-ac938a09e038/sudomi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 5172 bytes
SHA-256: 6e352ebcff7a8ebfa74ec3a30501aa62a088cf7c52304b263c7a07972cbbe427
font_01_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 11436 bytes
SHA-256: 05ec9b81b8df1a693b05df81137039e2115a29651f2e5e5928ea9c715b9b2b94
font_02_sfnt_off000138db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DB 16060 bytes
SHA-256: 84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727

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