Malicious PDF — malware analysis report

Static analysis result for SHA-256 e104ef3982c265e5…

MALICIOUS

PDF

79.5 KB Created: 2021-03-07 07:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0bfee64a08df949ba7970be2a4f5b115 SHA-1: 2de2b92dec81f7600001bca18d1b4fe1ac24180c SHA-256: e104ef3982c265e50e22dd780fd9b4b3fd8849730115bb7303057df24c07d608
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://gimoguvi.ru/strik?utm_term=summer+waves+pool+14x48 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450347/normal_601bfde18186b.pdfIn PDF document text
    • https://cdn.sqhk.co/xewiliwilax/gf3OjHc/5733798561.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411702/normal_5fe26b2946df6.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/dheejeB/11361322888.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/78630401815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484834/normal_5fefe3fd0fd2a.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/KiiHrNi/adidas_outlet_vacaville_coupon.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/jutuvakuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fd64b5400afd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5ffa7ea3da0a4.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/bjed2Ny/99638931926.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://liraperuwuw.atwebpages.com/why_is_my_wifi_not_working_on_samsung_s7.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/automatic_car_park_barrier_system.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_2d2bcb397fdc478589640ebc88695611.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/cm_to_feet_and_inches_chart.pdfIn PDF document text
    • http://zujisofivo.onlinewebshop.net/focusrite_scarlett_18i8_midi_setup.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_8871a1c716a746dcb5e4999f448db3e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusabifef/4509633750.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_17604080e3204f2697cbc3de32c085c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakadutof/rovazo.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/66145677054.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/63103919556.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_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 5272 bytes
SHA-256: f66591ff47c242198d99ced1d75c55363cdef614a736aaae0be6a4f17c4ef671
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 11168 bytes
SHA-256: 1ada3c6ba29e64a2d45fe94cff2fe69f14b8140c6f2884e7b7eba12c0441e009
font_02_sfnt_off000122a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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