Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca03c050d8edefb…

MALICIOUS

PDF

85.3 KB Created: 2021-03-09 00:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cfabdeb23d4e91e78a5bcf24bbb1450c SHA-1: c0a0cda5d98257221156f9ccfdddeaa8b3dc4253 SHA-256: 1ca03c050d8edefb1f3b51e63c212590c1dfb5f1798600f88a5d1decae0ebf4d
194 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a malicious redirector link and ML classification. The embedded URL `https://yafferge.ru/123?utm_term=teaching+mathematics+through+problem+solving+pdf` is flagged as malicious, indicating a phishing or malware distribution attempt. The presence of the `SE_LOLBIN_RUN_COMMAND` heuristic suggests the document may attempt to execute commands or leverage system utilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/123?utm_term=teaching+mathematics+through+problem+solving+pdf In PDF document text
    • https://cdn.sqhk.co/vojofarakiva/bg5cCmx/mens_hairstyles_for_thin_curly_hair_over_40.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/qhivhg1/21094348439.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/iigghic/download_my_burger_shop_2_hack.pdfIn macro / runtime command snippet
    • http://jofifuneku.medianewsonline.com/71046517686.pdfIn PDF document text
    • https://cdn.sqhk.co/mobubivifa/ggjjGji/duck_hunt_dog_laugh_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/hgfiezW/sling_7_day_free_trial_sign_up.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/tegakisurukapukotopad.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/sigavapukujoduderevogosa.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/iarhjgF/nebaxisinasuwovevigepiwax.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/jihhhbU/boost_ewallet_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/tpie6jg/28226583325.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/qhivhg1In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/childrens_chore_chart_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/rodatid.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/puretulenuza/emulateur_android_leger.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/77182774114.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/16345458873.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/amnesty_scheme_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/bostitch_sb-1850bn_psi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 5716 bytes
SHA-256: af8e02cf2fdb4e9e1a7b5fac7fd71edaac787a34fe49909f40a5aa65c51f9710
font_01_sfnt_off00010ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 10992 bytes
SHA-256: 17fc5ea641f4d54e0950559063e7ee7e8871cac749196f58418cd6062e136144
font_02_sfnt_off00013076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13076 16144 bytes
SHA-256: f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29

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