Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3087e040a119fea…

MALICIOUS

PDF

86.2 KB Created: 2021-03-23 03:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 424e3b99cd3d6c2f16a12885311e0b95 SHA-1: 5e1e83b2e2498268eedff683cd79a8e7cf7d1615 SHA-256: a3087e040a119fea55c8d6c780389b1ca723e652ee8de466dac9736019efd03e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The primary malicious URL identified is 'https://lozipotod.ru/123?utm_term=anime+komik+apk', which is likely used to distribute further malicious content or phish for user information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=anime+komik+apk
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/92d689032c8ae.pdf
    • https://mulafixi.weebly.com/uploads/1/3/4/3/134317856/goredij.pdf
    • https://cdn.sqhk.co/miburixegapu/ibZhbid/60294090600.pdf
    • https://cdn.sqhk.co/kitatoze/XugdNge/tepinuviwosejonukalekenav.pdf
    • http://accueilcmb.com/valebenexukajutjb6w.pdf
    • https://cdn.sqhk.co/xudevekelefe/iherGji/zombieland_saga_3d_animation.pdf
    • http://vezerfa.xyz/40727703397t6eor.pdf
    • https://cdn.sqhk.co/tejosepu/beGTigm/813331856.pdf
    • http://lukezelulevuf.22web.org/foxurelizuk.pdf
    • http://phtech.site/minecraft_joules_to_rfqvd6y.pdf
    • http://copyrighthelpcentral.com/public_health_nutrition_course_outlinetq5fm.pdf
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/ad2b37049.pdf
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/ddee7d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a9f056c0-40b9-4d48-9ded-2c54271db3d5/87579093845.pdf
    • https://uploads.strikinglycdn.com/files/d15efab7-d3ca-41f0-911b-62f99f4249f9/kizusilarawoxumavijo.pdf
    • https://uploads.strikinglycdn.com/files/000bcc73-3c72-479b-b566-80992d579e0f/86178542646.pdf
    • https://uploads.strikinglycdn.com/files/827a2030-9268-42f6-9486-8ea544772343/16584251375.pdf
    • http://waxivetik.epizy.com/romeo_and_juliet_act_2_scene_3-5_summary.pdf
    • http://tikixowogozomi.epizy.com/power_pole_transformer_fuse.pdf
    • https://uploads.strikinglycdn.com/files/8c250770-e0a2-4a26-a1bd-817af95f9b38/nomokitopos.pdf
    • http://lamuvovaw.epizy.com/instant_notes_biochemistry_free_download.pdf
    • https://uploads.strikinglycdn.com/files/b240d783-2858-433a-b147-adf6acbbab2b/sovosusedabekefa.pdf
    • https://uploads.strikinglycdn.com/files/50881906-246e-4dfd-a44d-60530be81bf1/kitchenaid_ksm150_artisan_stand_mixer_-_contour_silver.pdf
    • http://fatigovonid.rf.gd/best_isometric_games_android.pdf
    • https://uploads.strikinglycdn.com/files/bff0f624-4942-497b-b724-b3840400f547/wufapevafiro.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010084.bin
013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 2952 bytes
font_01_sfnt_off00010b13.bin
594d7f87f440b44908830735df30a4bddfe115a4c507553878af5365422c4e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B13 4712 bytes
font_02_sfnt_off00011b08.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B08 1800 bytes
font_03_sfnt_off00012396.bin
9af27673bcc5abc50dec19b755e4e08703d0843261d610e61967c6e0ec0896eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 11340 bytes

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