Malicious PDF — malware analysis report

Static analysis result for SHA-256 373e60d93eb63bee…

MALICIOUS

PDF

90.7 KB Created: 2021-05-21 18:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 27b41eea082eac35c5cc0969b3a5a1da SHA-1: dd34b14f3f8ecdc104eb66422ab11de652db6f10 SHA-256: 373e60d93eb63beeac71bc327603f989e3aaf3231d6e9fec1ed85227d4396d8b
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 0.9982

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://xajibur.ru/strik?utm_term=bible+niv+version+free+download+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fdc6abde8a00.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/gagav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fd15d5268ca2.pdfIn PDF document text
    • https://xewezepi.weebly.com/uploads/1/3/0/8/130813550/389daa009f.pdfIn PDF document text
    • https://bufezemaz.weebly.com/uploads/1/3/4/7/134714495/9065280.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/kisezejaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476010/normal_60049d39f04d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_6042d2ae2795a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485443/normal_606a2097892f2.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/tobaziw/how_to_eat_in_keto_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/reported_cases_of_zika_in_thailand.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/sign_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/womefepupadafopoxojizaze.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/borapisarasinokujeposu.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/auto_clicker_for_android_roblox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a742c49-084e-4ef7-8a80-bd97db7a23cb/daviwaxarikimonibikunoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fb1384-4af3-454c-afa1-1a0df17551ba/funny_difference_between_dogs_and_cats.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/52193831323.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/dedaselefojedukipijuvila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac04a311-422d-4901-b3b4-165550916d39/kojajisopupesiw.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/battery_down_kd_new_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f058a5e-3e5a-4535-9233-25815cedfb44/11318437061.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/16862754354.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 3384 bytes
SHA-256: ebfb67c147d1dc8a2a1a40e5f7e8b1e82123cb8a46be8cdad0068e31fd5d7b37
font_01_sfnt_off00010d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 5488 bytes
SHA-256: bd9ae0ba5a7c1130336dbac7b015b14347739005e05bf720276dc908d9701b61
font_02_sfnt_off00012008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12008 11348 bytes
SHA-256: 1cd3ad8e7b4ffecfc3af89611c34da51e295ee3c80c4520ab894b2bdfda0b039
font_03_sfnt_off000146f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F9 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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