Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c8f4653e16a137…

MALICIOUS

PDF

83.1 KB Created: 2021-03-30 14:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1959c76fef9fa56c57b0e7d521023cfa SHA-1: ab0cfb7cf7c068388d3a44112e52bda77133fbd7 SHA-256: d4c8f4653e16a1379cd293ade165cb1dc6601a7500b21e75c9b427d1a8dcf7cf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://crophysi.ru/123?utm_term=aplikasi+cheat+brother+in+arms+3+android PDF link annotation
    • http://nulivanofika.mygamesonline.org/pazenabonixijisepujogib.pdfIn PDF document text
    • http://lenulari.mypressonline.com/dajezijirinub.pdfIn PDF document text
    • http://seplafond.xyz/brother_hl-2040_reset_toner_light91juz.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/ibps_clerk_prelims_result_2020.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/powag.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/ge2haT8/hd_wallpapers_download_for_android_mobile_1080p_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/jghi78u/george_carlin_7_dirty_words.pdfIn PDF document text
    • http://secret-empire.ru/10899421951lo0ew.pdfIn PDF document text
    • https://cdn.sqhk.co/livoluxuwad/yage5uM/tixesisafiritavuti.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://uploads.strikinglycdn.com/files/ae382fd6-0526-49ed-94ed-4cc3e5f2dc2a/ge_profile_advantium_120_wont_heat.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/bring_me_the_horizon_doomed_multitracks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff7d1b7-d68c-402f-b9e1-01db718ac288/gubalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba000b7-d33b-4883-ab21-0a5ddb30978c/bimolunegexamufijifivem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e920004-8acf-419b-b696-1fee68278016/large_big_green_egg_cost_canada.pdfIn PDF document text
    • http://fawikinego.myartsonline.com/aestheticism_in_the_picture_of_dorian_gray.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/best_life_changing_novels_of_all_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f20e0d3-032d-4d40-a394-02b5f0b0b99d/uppababy_vista_sale_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c20137d-f967-421b-9ea7-0aa5d37a772f/66107976250.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 5460 bytes
SHA-256: 8a5658ad685553d38b42e465380d7c44544b04a6728e3292adf40a1214630d79
font_01_sfnt_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 22032 bytes
SHA-256: a7f7e2de081b3e298665448fce46fa8856f1face75acfe5e2b4f1578ab9e284f
font_02_sfnt_off000130e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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