Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d8b56dbf2db2c6…

MALICIOUS

PDF

78.9 KB Created: 2021-03-18 04:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: dd57e27ae36c2f323dae5431d53a91f8 SHA-1: c02cc288ca13a3dc8206c4845ac754a45a2fe155 SHA-256: 69d8b56dbf2db2c69b9c957747637afa63508eaca7550a1883d37f6c6da70e46
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically targeting 'epson wf 2540 ink refill', suggesting a lure for users seeking printer supplies. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, many of which are to S3 buckets, likely for hosting further malicious content or phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent, likely involving phishing or malware delivery.

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://xezojetit.ru/strik?utm_term=epson+wf+2540+ink+refill PDF link annotation
    • http://wigojomet.22web.org/awaken_the_giant_within_summary.pdfIn PDF document text
    • https://vimudizod.weebly.com/uploads/1/3/4/6/134632239/6742340.pdfIn PDF document text
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/suxoluteza.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/17fb4143ad.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/duzetixoruba.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/koxolewozelutoxedaben.pdfIn PDF document text
    • http://jidiwaxilo.iblogger.org/ms_office_training_book_free_download.pdfIn PDF document text
    • http://junebojano.iblogger.org/38016457861.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/taguxif/24281418374.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/91137859110.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/inference_worksheets_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/31983852949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6c66ef-599d-422b-bc74-0ad6173d080a/vutulivekuburavatazoz.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/52350185727.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/wuxemijuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d05d43-ead8-45b0-b25e-c44c1dad8ea2/dc_national_art_gallery_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29693aa-fc11-4ce6-9914-16843426b2f8/68651818218.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/behringer_x1222_mixer_manual.pdfIn PDF document text
    • http://fosadexovoz.epizy.com/48997502596.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/8271702702.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_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 5284 bytes
SHA-256: 063a9700a3ad7b5780772400fbaa629db9502eb323bc10d1d857d04965837325
font_01_sfnt_off000108bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BB 11140 bytes
SHA-256: acc034e26ff17e487330d6d3a637b98d615eb5b0652ce58f819a4e0cdf899ef7

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