Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a0184d9736b0cc…

MALICIOUS

PDF

69.0 KB Created: 2020-12-21 16:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4cb413f2c79be75315888e5dda9e162 SHA-1: b8394b2b9913de643f4b6e2157824ba6e006f5b4 SHA-256: 64a0184d9736b0cc2b216ddd10a08e328ee0aaf99e1c276b238010b9c677d915
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. Additionally, a machine learning classifier flagged the PDF with high confidence, and ClamAV detected it as a phishing trojan. The embedded URL leads to a malicious domain, suggesting a phishing or redirection attempt to a malicious site.

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
  • 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.
  • 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://cctraff.ru/strik?utm_term=great+brook+dairy+farm+carlisle In PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/7984403.pdfIn PDF document text
    • https://mekukirofex.weebly.com/uploads/1/3/4/5/134589797/filala-fujepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_5fda90571aa47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7a8125fa98a681f0fc516/t/5fd055db26d54b3c06cfd91e/1607488987966/tiktok_dont_rush_challenge_hot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d7dc67-cf10-4d7c-accc-0d7f3d243b05/bethel_middle_school_bryant_arkansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19d6684-d456-4ef5-abd4-cdd19cad832d/english_collocations_in_use_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08406588-570f-41c2-9436-917ccc1f6bda/ar_lexile_conversion_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0543b1-1f1b-449c-bfc7-a8ca4bdb8daa/fasirusikajutoxutaxetik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08c9c85-e229-4848-873e-cffa9c4d72f3/stans_sister_south_park.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffcc36609fd0ee78c2f31/t/5fc17fdb2dd96f5918280c0b/1606516700494/is_ticketsnow.com_a_legitimate_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201ea60c-8c5b-4ba7-b641-ee29aa42347c/fexapinumazigiruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7ade97-cde0-4807-a81c-2555f94cadc3/hyperpro_steering_damper_mounting_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/lufimanupimudesovabaraluz.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/fokajipizesikonunukab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7495716-4efc-402c-b2cf-58e5ce1ccc9f/lilojakorodazibe.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_off0000cfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC0 5504 bytes
SHA-256: 03a5038f97a2bbef3808bb2dd6f2510017bb2d9c09546fc119387afed30e6dca
font_01_sfnt_off0000e274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE274 10736 bytes
SHA-256: cab3f6ec370bfa9763104fc7cd8ad47711ec840e616630e2705c3645ed97ef0e

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