Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5f91c5c7a339a3…

MALICIOUS

PDF

207.4 KB Created: 2021-05-13 10:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ca4976c1654345dae67ae2cd5d6ad63b SHA-1: 551271088747484b9d59867b340fe6bdd5f37a40 SHA-256: cd5f91c5c7a339a3890ab981731e89a62ce5c403f35b53a7ca5748e0a3386a60
154 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 ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9696

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=lg+hbs+760+hard+reset In PDF document text
    • http://boldly-grow.com/22214454131wj6vz.pdfIn PDF document text
    • https://pikezusepi.weebly.com/uploads/1/3/2/7/132740337/6522106.pdfIn PDF document text
    • https://jokasagumejede.weebly.com/uploads/1/3/1/0/131070006/pupike-razejidugop.pdfIn PDF document text
    • http://gobigs.space/krups_espresso_machine_988_manualnv75j.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/vovok.pdfIn PDF document text
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/e0f3ddfa53bcc21.pdfIn PDF document text
    • http://classkaod.ru/61999627089da8pd.pdfIn PDF document text
    • https://wakezibi.weebly.com/uploads/1/3/4/6/134695128/kawotisilozexepa.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/gewesipa-guterelulotiba-zixovekebunak-gejoruxekem.pdfIn PDF document text
    • https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/zakefo.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/vibalufuxezon.pdfIn PDF document text
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/lojilesol_zodamamelivixim.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://ridakikasidom.weebly.com/uploads/1/3/0/7/130739592/3412721.pdfIn PDF document text
    • https://dapadode.weebly.com/uploads/1/3/4/6/134646205/35c21a1aed95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd154575-f248-46ba-bb29-bc677a6ebcf3/53513307254.pdfIn PDF document text
    • http://xufenazaliwe.epizy.com/how_to_control_pump_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1637f7a1-4de2-4034-b4dd-1890584315de/rain_bird_sprinkler_timer_esp_modular_controller_manual.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/siduvakeruvitebavarubado.pdfIn PDF document text
    • http://kanisisasulaba.rf.gd/jopotixila.pdfIn PDF document text
    • http://wuvafox.epizy.com/black_and_decker_weed_eater_spool.pdfIn PDF document text
    • http://zadedasex.epizy.com/vetesisunod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8885fc02-0233-4abf-affd-2e707d0c00ef/11782768182.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 165708 bytes
SHA-256: 908d23d4911b16c146865f724a80e2cf0786d49094dba508866f297671a9c2f4
font_01_sfnt_off0002e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E498 5512 bytes
SHA-256: 5308c01a4a0f803d9b982e9c94730cbacd4581f78fac883324bafbb0a01bd026
font_02_sfnt_off0002f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F759 9296 bytes
SHA-256: 536c164823f5b3728645f1f5b90a287ca094d756acb3ef6094409602649d4619
font_03_sfnt_off0003174d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3174D 16060 bytes
SHA-256: 9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a

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