Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7f076d220d9948…

MALICIOUS

PDF

75.2 KB Created: 2021-02-23 01:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 23dad165d5a7e24527cc8e08ee22a15d SHA-1: 28377883a150be1b28156dde5bcc9f619271f8b6 SHA-256: 6a7f076d220d9948664f82c50c11ed63061f242fc7161580a89d3e23580ac157
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, mentions "how to install ms project 2010", which is likely a lure to direct users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/123?utm_term=how+to+install+ms+project+2010 PDF link annotation
    • http://pozerebidilu.iblogger.org/56068418912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484363/normal_60012c5007ce7.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/ijhiies/hungry_shark_evolution_hack_download_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_60245cad22c29.pdfIn PDF document text
    • https://cdn.sqhk.co/buzunonoj/qDgd7jh/69274422360.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/XijhdLp/55372685147.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/java_jdk_32_bit_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5fe546e4485c7.pdfIn PDF document text
    • https://lefojokux.weebly.com/uploads/1/3/5/3/135399193/newekugafibaled.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/sgesiJr/kexesenijigafasi.pdfIn PDF document text
    • https://gokepitamewema.weebly.com/uploads/1/3/5/3/135325242/7493260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5fe5baf0eb03d.pdfIn PDF document text
    • https://temisufe.weebly.com/uploads/1/3/5/3/135384001/sovubozoronojez_dubixomasuguvos.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
    • http://taxisariwoboduz.epizy.com/4._6_graphs_of_tangent_functions_worksheet.pdfIn PDF document text
    • http://furovival.rf.gd/76187023958.pdfIn PDF document text
    • http://katezoluvezile.epizy.com/7971521692.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_off0000da53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 5324 bytes
SHA-256: 7476cf9a7558a84c50ec00d7a699b4f9f3aa0458c2258edcffefde54455f5263
font_01_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 10884 bytes
SHA-256: d99571020413262988ce0e9a634c01c2822544f8d9152e4defed051ed411c079
font_02_sfnt_off0001116c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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