Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe4eb867a24335a…

MALICIOUS

PDF

87.9 KB Created: 2021-03-20 15:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0349d86625eefb18e5713bd8690336e4 SHA-1: 64ff1a772f4f3019b8f406c80dabe8322dce712e SHA-256: 3fe4eb867a24335acb62a801043bee79e4298954c2035b298dd2cb312c0f8c47
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'quotes about self confidence and happiness'. No scripts were extracted, but the overall structure and URL distribution strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cdn.sqhk.co/murajefovel/iDsjasT/brawl_pixel_top_down_shooter_engine.pdf In PDF document text
    • http://joritirumag.mypressonline.com/rakowezegusofav.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/qiahbhc/vukizedomixoxiwuwasa.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/gdifijf/78369877475.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/jgXhask/wawawagisefowedigusi.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/keronijerakufanawe.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/gdhhhga/50637537473.pdfIn PDF document text
    • https://cdn.sqhk.co/fagevibe/oRd4hgW/latest_android_tablets_under_15000.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/4517992323.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/hdicZMU/exploration_lite_craft_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bQ3nTxENlgE/wb?keyword=quotes%20about%20self%20confidence%20and%20happiness%20in%20hindiPDF link annotation
    • https://s3.amazonaws.com/zurovajij/nironowezexulejivinami.pdfIn PDF document text
    • http://jodewejuwuw.epizy.com/marvel_future_fight_beginner_s_guide_2018.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/clasificar_numeros_racionales_e_irracionales_ejercicios.pdfIn PDF document text
    • http://fogivezin.rf.gd/what_is_developmental_and_life_course_theories_of_crime.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/inventory_report_odoo.pdfIn PDF document text
    • http://munakazoxan.epizy.com/50106220254.pdfIn PDF document text
    • http://pofijiserige.onlinewebshop.net/39475146287.pdfIn PDF document text
    • http://nopivul.epizy.com/convert_mini_digital_video_cassette_to_dvd.pdfIn PDF document text
    • http://kufekamulez.rf.gd/82451856611.pdfIn PDF document text
    • http://kikukuvikato.myartsonline.com/zobeturumupoxirune.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 5348 bytes
SHA-256: 5b83e4430cd9fc4d69556f91731c8f3140108ad1622cfa90c790060a96b74533
font_01_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 10476 bytes
SHA-256: 9c54dcb4adcf68e6c6d4ce74c5dface5da298d679972723f4fafc040c22d8817
font_03_sfnt_off00012dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC8 11616 bytes
SHA-256: 213136d1160f421324eecc848007744a0db07e9cb287313bcbb6a13a67a1a54c