Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8914f185c4d7084…

MALICIOUS

PDF

87.2 KB Created: 2021-03-25 01:05:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a8a5614ce77d639e538898c2a165e89 SHA-1: 50c84d0596f3c07f5d4786915007b635cf74ec96 SHA-256: d8914f185c4d708449fdaa9940d59652fb28637610ef03232b3d947947f5cd4b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. The document body's text, though garbled, includes 'reset glitch hack wiki', aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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
  • 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://jacksth.ru/wix?keyword=reset+glitch+hack+wiki
    • http://vegofejolafud.mygamesonline.org/71124679246.pdf
    • http://tigadugutuvatix.mygamesonline.org/89198355446.pdf
    • http://bivaxosufuxibo.mygamesonline.org/how_to_reset_schlage_master_code.pdf
    • http://solifixogalek.mypressonline.com/5581332038.pdf
    • http://jebifawulu.mywebcommunity.org/troy-bilt_mustang_22hp_42_in._zero_turn_mower.pdf
    • http://kazimibi.getenjoyment.net/23347129702.pdf
    • http://setopin.mypressonline.com/network_cabling_standards_and_practices.pdf
    • http://bifozitixexidad.mygamesonline.org/bargain_quest_black_market_rules.pdf
    • http://mofobawosenej.mygamesonline.org/bernhardt_hamlet_script.pdf
    • http://zuwazekanusur.mypressonline.com/zanoselewasomolipakavo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_99443c32a39e4d56995a8c9dd06b3a5e.pdf?index=true
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_494091aca9bf4ec08e4406a94878edf6.pdf?index=true
    • http://xekazaz.myartsonline.com/achilles_stretching_exercises.pdf
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_28bcabd6bcec4604998a9457f1c4b076.pdf?index=true
    • https://uploads.strikinglycdn.com/files/92e1d40c-4f00-4a24-aa4b-4d551f690105/which_one_is_the_best_field_in_computer_science.pdf
    • https://uploads.strikinglycdn.com/files/167136f9-df90-4971-8d5a-075264a20b3a/pathfinder_classes_sda.pdf
    • http://loxupobupibim.atwebpages.com/adding_and_subtracting_fractions_interactive_notebook.pdf
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_8822ab33feb449e7a3cc5103a0fce9e4.pdf?index=true
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_fcecf15dabce446ca3075cc58a878e71.pdf?index=true
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_76d37c2138e74b0088fe45bc166d950a.pdf?index=true
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_31b53ab5e5d742cbba1107ddb90f160a.pdf?index=true
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_0d92d7092cd041aab2b2fdaceca10594.pdf?index=true
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_4357df9c9f354708b69c649d663975be.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ed513b6-6220-4109-8a81-4e33fdc0aaf1/pemezema.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101a1.bin
9b470e4856c7edfdf4d1f71d7c724d82d1d271995656f38a5acd8f07c185df17
pdf-font-stream PDF embedded font (sfnt) at offset 0x101A1 5128 bytes
font_01_sfnt_off0001132f.bin
3d21b5d2dd8898d2771266a58b202237df0a1a7e66ea0843df98b7db8f7d0c3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 11160 bytes
font_02_sfnt_off00013950.bin
d6354e55a0ef37be0a61ea5c81a5777e0d3d2e8edb3ff3de3a4eaf5ff52a9aaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x13950 16348 bytes