Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f681faca909a907…

MALICIOUS

PDF

108.2 KB Created: 2021-02-28 09:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e24a5d13b01d9bff1203f412d235447d SHA-1: 273e88455264515167ab5b8b2c7b82ee9fb279b3 SHA-256: 4f681faca909a90715e33e8d9e775e3ed0cfe91d60a1cd8e4daf51ad2997e366
156 Risk Score

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://crophysi.ru/123?utm_term=linear+inequalities+in+two+variables+answer+key PDF link annotation
    • https://pezomivagijo.weebly.com/uploads/1/3/5/3/135392772/woxotijopuwebu-fejowemunez-tiboxezu-pirikeliwuxuv.pdfIn PDF document text
    • https://jeluvuxibobuna.weebly.com/uploads/1/3/4/0/134017570/ludoxagoki-pafanif.pdfIn PDF document text
    • https://meronikam.weebly.com/uploads/1/3/4/7/134705372/fufobosamud.pdfIn PDF document text
    • https://vimanofadubob.weebly.com/uploads/1/3/5/3/135304206/toguxomenazu.pdfIn PDF document text
    • https://valabonef.weebly.com/uploads/1/3/1/3/131379230/wumifadorasam-bodase-jawigarevok-wadibala.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/wawesu.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/has_aot_manga_finished.pdfIn PDF document text
    • https://karozazosepi.weebly.com/uploads/1/3/4/3/134316788/penabovogezufe.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://s3.amazonaws.com/zalomi/90155114394.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/betty_crocker_blueberry_muffin_mix_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/template_of_p_l.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/do_you_have_to_bake_a_pound_cake_in_a_bundt_pan.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/40833618580.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/assignment_of_hap_contract_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/xigukapeloxopovitor.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/46874355463.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 25160 bytes
SHA-256: 32a936336e0e8414e8250754f03776cdeddecdfebbedd5a7d43a84939b0f50d6
font_01_sfnt_off000146ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AE 5084 bytes
SHA-256: 25836e5f5e7fc00a8daaf3622cfab7757fc83616bbea28cf0aadd853b85cc0df
font_02_sfnt_off0001581f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581F 11248 bytes
SHA-256: 34b7a1d32fb9f47319679e9185ce6fe7d61d58d8ec0273bb08500286a9c9c509
font_03_sfnt_off00017e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E8E 16244 bytes
SHA-256: e208d6fa2ecc1ee8b98dd0bd1684ffb5e3891779cf61ffdb9cb439440ba08a20
font_04_sfnt_off000193fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193FD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.