Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c81a5aa127d176…

MALICIOUS

PDF

64.7 KB Created: 2021-01-02 12:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 989154ed556e884ec9bd22e2d4304fa4 SHA-1: 7061173289b4afcbf798d02a1da53cc1be2bbef7 SHA-256: a8c81a5aa127d176f6d401cefbf73559d417d62e844673fe0e6102cb5d193e35
96 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. The document body, though heavily obfuscated, contains text suggesting it is a lure for search results. The embedded URL points to a suspicious domain, likely serving a malicious payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?utm_term=benny+hinn+songs+free PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f15253-3b7a-41dd-a535-b171616b86ae/33211095610.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/65877048377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d1dd6a-102f-4ad4-a4af-df0223a3e806/amy-jill_levine_good_samaritan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7532be8-ade4-42fa-a193-7b9bf5e68f90/arduino_basic_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/72543239447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a2ecc93-85f0-46be-9e0b-03aaecbf9bbd/virtual_friendsgiving_for_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2172a60e-61b6-4838-89ce-164a07ff72a8/gogivigil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a6be68-d8fe-4cfd-aea6-8de4492f1446/shaker_kitchen_cabinets_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3563c6-0ee5-4f75-9ecb-b50ca749ce00/89445714379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b149ce28-e426-425c-8b7a-7057ac8885db/razigenirefo.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/bronto_platform_saddle_gfi_code.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/amar_ujala_news.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3684550d-40f4-409b-8050-fc2ecda75c30/the_washington_manual_of_medical_therapeutics_amazon.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_off0000c01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01C 4940 bytes
SHA-256: 61e7e76d7cfe5d466e48bfe6bc2b7acd62d57360be23281a70ad127b60498d4b
font_01_sfnt_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 10852 bytes
SHA-256: 476615347beee37ebf65f600e163b90f24b708908848884517666ca0b16dd9ad