Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e72de5be253f899…

MALICIOUS

PDF

67.9 KB Created: 2020-12-19 10:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7a7aa8aa3a8261fe51f03a753a596e23 SHA-1: 185b75f70bbac197c059577ea0fea6d2abb03789 SHA-256: 7e72de5be253f89947abac18f433bad42d92206708eb09a3df586af50c4dd316
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the embedded URLs, https://traffnew.ru/123?utm_term=papa%2527s+sushiria+unblocked+mysteinbach, is flagged as suspicious and likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to the suspicious URL, suggesting an attempt to disguise malicious content.

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://traffnew.ru/123?utm_term=papa%2527s+sushiria+unblocked+mysteinbach PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5faf28b16f74a.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/wetino.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/9ba57a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5f8ecebf785db.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/e48f942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9c1215-a183-4ab5-a7a1-6ecb8f97a371/26983448070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abf1a40-7374-4bb3-92c6-caeb1ff62002/awp_2020_fee_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf30d18-ceb3-4381-95f4-d4d619cec562/76122047833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08314f62-ef02-4180-bb06-ff7a477cf54c/learn_emirati_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/natexup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2537e0f0-2d02-4288-b3e7-49aa9b2757bd/52153018353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f09881-3312-4194-8b86-fe76ee24f3c2/72724251644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f5622c-d369-4985-b16b-44c2e9e6c0bc/timatoxiniw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c32b687-5807-4bd7-b9f8-860ca2b8db8b/scp_thaumiel_class_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d35c28-5021-49e4-bb6b-e1f746188e86/3549112250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4db9a39-caa9-4481-aaf4-c5adb850f143/98313758111.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_off0000c97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97E 5652 bytes
SHA-256: e94a124b2c76231baa1ed163969352fc66525d466cad6cbf321e9f4b6bd475ce
font_01_sfnt_off0000dc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8F 11456 bytes
SHA-256: cd1b439ee685a7e9f256b8da73c40281af210393620d7f834d81f3146434e108

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