Malicious PDF — malware analysis report

Static analysis result for SHA-256 022e6b2a84bd8b92…

MALICIOUS

PDF

85.2 KB Created: 2021-03-31 07:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b78725493acc11adb4365932dca807be SHA-1: 9bea41d233cc500d60c018984d62fe858799b7ac SHA-256: 022e6b2a84bd8b9239a205dd9c6ffbf478206b471223a501bf859323fbd540d6
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, many of which point to disposable hosting or known redirectors, indicating a link farm designed to distribute malicious content or phish for information. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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.
  • 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.
  • 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://dafemum.ru/123?utm_term=soundcloud+mod+apk+android+1 In PDF document text
    • https://cdn.sqhk.co/kukisigafumi/QhiRWqJ/jamaica_rjr_radio_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/gdtlXgg/whatsapp_business_app_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/ha1Bjde/modetigupas.pdfIn PDF document text
    • http://fetoxuk.mywebcommunity.org/formulaire_cerfa_15186_2.pdfIn PDF document text
    • https://cdn.sqhk.co/joxudilabi/rUsgfgc/shadow_blade_game.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/jdm0jiw/kill_shot_bravo_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/gfrhaY2/portal_mod_mcpe_1._16.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/placenta_grados_de_madurez.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/501hfU3/69572497011.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/jj6Agic/rage_2_i_am_death_incarnate_glitch.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/hduiijd/among_us_wallpaper_iphone_xr.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/FTEpjhX/microeconomic_theory_basic_principles_and_extensions_answers.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://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_88e41fa697e246999e546fc2e8dff9dc.pdf?index=trueIn PDF document text
    • http://xalobazinapirep.epizy.com/89867396626.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/zugunil.pdfIn PDF document text
    • http://kubugaganovipo.rf.gd/toshiba_tv_dvd_combo_remote_control.pdfIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_e2628710f79d4db28e3f2eaf4aa99e47.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_4f15243e48cf4b45b2315ab71ec03d26.pdf?index=trueIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_4a828de2c0874a9db29e969690fec50d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/how_much_does_it_cost_to_flush_a_tankless_hot_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/50555030919.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_a739a0fcf731495b995a3374c02cce85.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF722 4944 bytes
SHA-256: f5e03a81a3d7b68a4de3eb486a6d2c045e75c8381863d0f785a4727a1c1d4de8
font_01_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 1964 bytes
SHA-256: 1d18534733479c870a78c46a90b83ed8aff410c3511f6838c5b83347f92bfa48
font_02_sfnt_off0001111a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111A 11020 bytes
SHA-256: 384ee0c876583c48da4525a9ad88e1b2cdf7f05de779804301937f92679c3853
font_03_sfnt_off00013708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13708 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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