Malicious PDF — malware analysis report

Static analysis result for SHA-256 362a561212a01820…

MALICIOUS

PDF

71.1 KB Created: 2021-01-20 07:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 48b4ee791bd605b49fa1695940e133b7 SHA-1: d8b8d46548f2566888ff9b4a35ee7b6e66a7eb9f SHA-256: 362a561212a01820359d73a617109b26a2c7e208d4b71d08db4db1cddee43d17
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The heuristic firings indicate that this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure the user to external, malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://yafferge.ru/123?utm_term=wwe+2k+apk+aptoide In PDF document text
    • https://cdn.sqhk.co/letojeka/hjgjjgR/48310985203.pdfIn PDF document text
    • https://vadukoku.weebly.com/uploads/1/3/4/7/134707593/9195949.pdfIn PDF document text
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/74a6fd.pdfIn PDF document text
    • https://wixinuwexe.weebly.com/uploads/1/3/0/7/130739185/pabip-bedololedamone-pumizeza.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/d5CjbEp/claw_machine_for_sale_big.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/ii6GiiN/jijuzaguripokegazovadurog.pdfIn PDF document text
    • https://cdn.sqhk.co/duxapotor/99hggiy/walukaga.pdfIn PDF document text
    • http://baxemoge.iblogger.org/data_and_reporting_analyst_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/cifgcq0/puzutazej.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/YgdjhaW/ford_mustang_super_snake_2019_price.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/94Fihfc/rewuminowixerema.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/ijHhag9/sisters_of_charity_hospital_er_wait_time.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/55814516237.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/vigesek.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/44310413934.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/15_chemical_kinetics_rate_laws_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/inherently_safer_design.pdfIn PDF document text
    • http://lokuvutifinulef.rf.gd/osmosis_jones_movie_guide.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_off0000d81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81A 4948 bytes
SHA-256: 371b1b0f7a3554dbe1f4b39d494e27e740eca699052a12bfa0e220206660a443
font_01_sfnt_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 11096 bytes
SHA-256: cad4da7627696e5c06957a12ac8109c19ae9d3f1192bcc55986475a72152601a

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