Malicious PDF — malware analysis report

Static analysis result for SHA-256 2887445077ae75c7…

MALICIOUS

PDF

81.3 KB Created: 2021-03-29 01:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bb23f6b5bcc4b8bf9c24fe4603efb918 SHA-1: 39632ef00e01d049e7f876d1e3324dd3ba054e9d SHA-256: 2887445077ae75c7e75be0ec29009feb4c39e5bebc40b6e67282d7eba429c24e
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 0.9992

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=why+do+i+argue+with+my+parents PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372087/normal_6052c3fd85f07.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/89405335268.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/95329904432.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/walusuvesakifatix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5ff2a19184502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484807/normal_5ff84c5536af0.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/colt_competition_ar_15_cabelas_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_6054f637cf982.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/allahabad_university_llb_syllabus.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
    • https://s3.amazonaws.com/fosawef/employee_acknowledgement_form_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/nolamijajedurawomarisi.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_59994300bdab4f7f8c4b72b242f14e9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/85138467218.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_d4e021a87c1d4baa8ea81e83638662c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gosete/42040965296.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_136bc656685641df934434e33295654d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/gaxawurogiwowoze.pdfIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_25ad8df114b14b43a2021dfd93f02c10.pdf?index=trueIn PDF document text
    • https://951e66c5-660f-4748-bfcc-a6cc0831133d.filesusr.com/ugd/4967bb_2cdf6b9eb63040e3b2ee37f486fe9068.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusixa/19075876014.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/82480726634.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_9949ae61a4404687ab58cd78aaa2e23f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/97991482608.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_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 5428 bytes
SHA-256: 114d93207751e0b51ab20c701bba6b167e0174e70e1ae77d863259a960a39ec8
font_01_sfnt_off00010552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10552 10660 bytes
SHA-256: 1da472dbd988de6b75f8fcb2310a199637996af7cd1b3e894517fb6f1e484764
font_02_sfnt_off000129d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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