Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38db38507374cc3…

MALICIOUS

PDF

82.0 KB Created: 2021-03-19 19:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f9d4c4bdd5591ec8d5ed8258573cca SHA-1: bccdbc0bba66c5eec8cb892ae5e7af3d6e4cbc80 SHA-256: d38db38507374cc325f8f587c827db65dbe3689d37aa2df182fab578fa55499b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme. The primary URL, 'https://nipisod.ru/wix?keyword=osrs+barrows+pure+guide', appears to be a lure to a potentially malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=osrs+barrows+pure+guide
    • https://cdn.sqhk.co/bobimugura/5Jiixar/71492594064.pdf
    • http://uptodate.site/how_to_open_lint_filter_in_lg_washing_machineak976.pdf
    • https://cdn.sqhk.co/vasozaponem/idrijYW/xakor.pdf
    • https://cdn.sqhk.co/xizefonuma/5krWwjg/61321598503.pdf
    • https://cdn.sqhk.co/dibirolinu/uX1dEid/15344525923.pdf
    • https://cdn.sqhk.co/mijajijem/YUtidib/xekiporaruzigubofun.pdf
    • https://cdn.sqhk.co/xiwapusumoge/jdxBNxI/35469656291.pdf
    • http://goloszauniver.fun/naxozafizajebac25d2.pdf
    • https://cdn.sqhk.co/mumeriretepi/QvCjeE9/26733937760.pdf
    • http://bosnoslovnoejelaniekupit.xyz/muselijodarigolufiraw07p5z.pdf
    • http://agentsoft.space/indus_valley_civilization_crash_course_world_history_2_worksheety1wm1.pdf
    • http://beststudent.fun/fikazawukugodulesu5v4bm.pdf
    • https://cdn.sqhk.co/miropefaneka/eY4s6jg/viwukexakotopalulerujukaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e990ab3a-fa20-4ec7-9052-1e3e47466efc/mudeluj.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/how_much_is_the_bus_fare_for_seniors.pdf
    • https://uploads.strikinglycdn.com/files/5078a12a-86bc-4d86-8902-ad4e48b51ea1/kivodulenozunenamojoni.pdf
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_e6cfb59b933849e292fe969d49e23f3a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a61c64ab-0d6d-47d5-aec6-4af4385ac0c2/1328957891.pdf
    • https://s3.amazonaws.com/pewebopufupe/uniformly_badly_approximable_systems.pdf
    • https://s3.amazonaws.com/fekazudabo/android_gps_coordinates.pdf
    • https://s3.amazonaws.com/wuxupewu/company_of_heroes_2_multiplayer_gameplay.pdf
    • https://uploads.strikinglycdn.com/files/c3405f12-fb0b-4439-ac6b-43736f901d84/assassins_creed_2_strategy_guide.pdf
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_82969635b23c4234ac89d5b87567a5bc.pdf?index=true
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_7877550426cb44a9a3ceccc158f971f0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f571.bin
cb5301848048189d4c5e843c9360fbd3e5422884706dbce5a1dc38bb6b298048		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 5048 bytes
font_01_sfnt_off000106b6.bin
648f912042e22b9e33666d0d3c08d070b1defbe9db98c893d4d8a7794f9f494b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B6 10632 bytes
font_02_sfnt_off00012b1e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.