Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd2bd9515ad58bf…

MALICIOUS

PDF

77.7 KB Created: 2021-03-31 06:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 210006590a771f4f1e5ade414475cdf3 SHA-1: d72ae69c1fb6c3a15057b20c4096220267377cee SHA-256: 7cd2bd9515ad58bf118adf985065e3cb42958a9ad93234cdadd42c46b7f3fc91
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though partially corrupted, suggests a lure related to 'Fmla adoption leave form', likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=fmla+adoption+leave+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5ffd10f07532d.pdfIn PDF document text
    • https://fefoxotavom.weebly.com/uploads/1/3/5/3/135328849/6adf0f34.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/2892902.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/vakufet_lapapisapifos_zeluzigi.pdfIn PDF document text
    • http://wuxifev.iblogger.org/punukobeba.pdfIn PDF document text
    • http://getyourscore.info/mandated_reporting_laws_ohio09cjt.pdfIn PDF document text
    • https://zumegopepotiko.weebly.com/uploads/1/3/1/3/131398003/xokimukubefewukotid.pdfIn PDF document text
    • http://goodsun.fun/srsd_writing_model_factszg5uv.pdfIn PDF document text
    • http://buytoday.cc/dd_monster_manual_3d_modelsw7695.pdfIn PDF document text
    • http://craftsmansmetics.com/arcade1up_golden_tee_pcbbxp0q.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_6035250ebb104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/figugipopar/30328890370.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/ladies_who_lunch_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/41212634759.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/kemufupawonofawoxikuso.pdfIn PDF document text
    • http://xofigawarogipiw.rf.gd/inventory_cost_flow_assumption_for_a_merchandising_business.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 5024 bytes
SHA-256: b6a52bbdbe58bda0c39f0f967fca0ea2d78ff3969e53ed505145114e755ee403
font_01_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 10348 bytes
SHA-256: bcbfa6d501d7f08a92f487f964794f8ffe6334c31370a90fe4e0cda21a440c08

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