Malicious PDF — malware analysis report

Static analysis result for SHA-256 600e02dfaf8605be…

MALICIOUS

PDF

74.9 KB Created: 2021-05-22 12:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1088f904e6a9e8ccebc7e98f1983fd9c SHA-1: ec84876316fe859a5973b9e8357731d6f21a3478 SHA-256: 600e02dfaf8605be2f8bd193679b2aa09eba7c1d1f5d096edc82ef75e5b24a9a
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign-looking PDFs, suggesting a link farm or SEO poisoning tactic. One primary URL, 'https://seumenha.ru/strik?utm_term=how+to+find+total+surface+area+of+a+triangular+pyramid', is present and likely serves as a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://seumenha.ru/strik?utm_term=how+to+find+total+surface+area+of+a+triangular+pyramid PDF link annotation
    • https://xafuzijinole.weebly.com/uploads/1/3/4/6/134667747/1189732.pdfIn PDF document text
    • https://rifusefabizavi.weebly.com/uploads/1/3/2/3/132303317/a35fb64fc.pdfIn PDF document text
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/6821493.pdfIn PDF document text
    • https://koxowugazetumul.weebly.com/uploads/1/3/6/0/136015765/movabumudegu_jililubezapedu.pdfIn PDF document text
    • https://tivufele.weebly.com/uploads/1/3/4/6/134615601/9528304.pdfIn PDF document text
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/e81ab57be792.pdfIn PDF document text
    • https://kusebavizekofuk.weebly.com/uploads/1/3/4/0/134098677/jabalupen.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/kexabo-burosanudomared-sijemod.pdfIn PDF document text
    • https://jivudajen.weebly.com/uploads/1/3/4/4/134470456/radegogesepidovepu.pdfIn PDF document text
    • https://debugifepini.weebly.com/uploads/1/3/1/0/131070476/sasurixutebileranup.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/pevarijidasalop/dnr_fishing_report_saginaw_river.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/giwovonupiburuvekupape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8fe200-5783-4acb-b83d-67db0f09a028/rusotanetapar.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/bebavowo.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/subobutikokelumokumutojo.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/xuvuzosikufugi.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/telecharger_shazam_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/templates_para_powerpoint_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8cd060e-4b20-44ff-b141-332c9e3a419b/the_way_of_the_superior_man_a_spiritual_guide_to_mastering_the_challenges.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/learning_java_programming_with_eclipse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219bfb93-fd25-447d-a2f6-1612012bbc23/4759343047.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_off0000e52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52C 5632 bytes
SHA-256: c6651d2702870503d70d185024ef0c519bc3b44c77ab711bab7587eb426f1b37
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 10948 bytes
SHA-256: 13cdc69baf3a82bb1cc8e107de48ebacccea11df0584cf97adc9b2fddeddec1e

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