Malicious PDF — malware analysis report

Static analysis result for SHA-256 7537106d4ebf2b3b…

MALICIOUS

PDF

92.1 KB Created: 2021-01-21 19:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e4969596ac94f06f8abaff47dca97b07 SHA-1: ce7694d95646dffc575bced08874386aa44d23f9 SHA-256: 7537106d4ebf2b3b64f541f63a6ef1d592b91c30952a24157ed2950249598ff7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to distribute malware or lead users to phishing sites. The embedded URL 'https://traffset.ru/123?utm_term=free+comics+and+graphic+novels+apk+download' and the first link in the farm 'http://zemegazi.22web.org/53067652318.pdf' are suspicious and likely serve as entry points for further malicious activity.

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
  • 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://traffset.ru/123?utm_term=free+comics+and+graphic+novels+apk+download PDF link annotation
    • http://zemegazi.22web.org/53067652318.pdfIn PDF document text
    • https://site-1174473.mozfiles.com/files/1174473/famugufelupu.pdfIn PDF document text
    • https://pemalerokefoge.weebly.com/uploads/1/3/1/6/131606165/696b128b7eb.pdfIn PDF document text
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/lagerubowebuj_panutesotiz.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/c19825.pdfIn PDF document text
    • https://lipixifafamuxa.weebly.com/uploads/1/3/0/9/130969384/ca5a72fb7e.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/zopogeva-zilenuroziru.pdfIn PDF document text
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/ca92118f1fcc2.pdfIn PDF document text
    • https://site-1178429.mozfiles.com/files/1178429/33814920078.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/8092247.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/7955859.pdfIn PDF document text
    • https://sakoxezi.weebly.com/uploads/1/3/1/4/131437859/konukakameso.pdfIn PDF document text
    • https://site-1178518.mozfiles.com/files/1178518/13307803373.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/bisiku/vofitijugidemunim.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/exercise_3_sentence_completion_lesson_15_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/sogazizuvuxixuwuk.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/kavivokolojirabajadu.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/tazanepazexixogejada.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/sql_server_2014_free_with_crack.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_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 5656 bytes
SHA-256: a11b9540bcb2f2e5f036cb68dc989d94b5ea652e6fcd93813095b1275a973643
font_01_sfnt_off00011548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11548 13760 bytes
SHA-256: e2daeb28f8e09cb444d2a70807f23738fba5defc119deff3db781859f9942c5d
font_02_sfnt_off00014496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14496 8612 bytes
SHA-256: 0fc1ef4b6fcf29a596c2cba10c0a993ae325b7a521c7d49e0c0fcf5b9b0238bf

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