Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4c20676a5994ca…

MALICIOUS

PDF

69.5 KB Created: 2020-12-20 04:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6994781025f8ca7eac20f1caf4ca61de SHA-1: 4d6790d9c3670a7179941d05c37c2c834b4c7b8b SHA-256: 9b4c20676a5994ca9fc6ba9e6cb4ec56e84caf46a7b70b7513123e5090588b54
234 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure and a large link farm, indicating a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' further suggests a callback phishing or tech-support scam pattern, aiming to trick users into calling a number. The document body, though heavily obfuscated, contains text related to 'Jacksonville nc dmv registration', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffmen.ru/strik?utm_term=jacksonville+nc+dmv+registration In PDF document text
    • https://golakabuzoved.weebly.com/uploads/1/3/4/8/134870140/zazabobapobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_5fc039e002998.pdfIn PDF document text
    • https://vojumemij.weebly.com/uploads/1/3/4/4/134473557/neboz.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://uploads.strikinglycdn.com/files/0fc18157-fb10-4c27-b736-ff381feb1f3d/identifying_energy_transformations_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4221ea19-2099-421c-9fe3-ed67c1d23594/24348960901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a30bfe-56fe-45e8-9115-e1205a4230cc/67875925525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e40735-20a6-4102-8d38-bd824b043d37/chinese_restaurant_in_paris_las_vegas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffac834d-3c98-4742-9b26-9abd76689c7b/zofejudulixina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b1dd37-651c-42a1-b6e1-ef7861b7154e/classification_of_four_organisms_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d44dae-9f6f-4886-a274-1b27220b9a71/96784056144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e87df6-fa64-48b2-a259-fdef9364f7f4/reglas_de_los_numeros_romanos_con_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b651c7-4a11-4ea8-a1b3-a1338e88b7bb/sea_turtle_facts_endangered.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3bf554-a99a-42b0-bd6b-73011265e3e2/consider_the_differential_equation_dy_dxy-1_x2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd26551-cefb-4978-a7d5-4514862a8a7c/jefumavexenesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531b5bb7-0a0d-4f28-a77d-080d4365b50c/xogajozit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fbee6b-6e88-4599-b142-b99fd55bcc61/84304427883.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC573 5160 bytes
SHA-256: 29606c6bd12110d05fb1488574d80cdb68e496d63244f77e06afc7f32c4c5733
font_01_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 10496 bytes
SHA-256: dc364af894de408d2692eb73b023847159025a970c9f5337fe740a38ef8c9d4c
font_02_sfnt_off0000fab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2