Malicious PDF — malware analysis report

Static analysis result for SHA-256 964916de28f2a7b9…

MALICIOUS

PDF

73.1 KB Created: 2021-03-29 17:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 349cc765ee7117b4e41cc97ec3531bb6 SHA-1: de50c1431b909b4a778ea1c4e3f9c9ddeb534518 SHA-256: 964916de28f2a7b9921b40018b9a2a82095ab12238b0523e2a4927e4988e7916
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to various sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=free+pdf+to+word+doc+converter+mac PDF link annotation
    • https://cdn.sqhk.co/fakineduxafe/gihcihG/monster_evolution_clicker_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/jaFCiaS/dirt_sprint_car_racing_near_me.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/8b2dc311c8c8b66.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/nudewadikofepiposano.pdfIn PDF document text
    • https://desujerobum.weebly.com/uploads/1/3/1/0/131070458/simipupijibad-kabinojarurojas.pdfIn PDF document text
    • https://niridugur.weebly.com/uploads/1/3/5/2/135296669/9627794.pdfIn PDF document text
    • https://keloxexazim.weebly.com/uploads/1/3/4/0/134096686/5ead089aea38aa3.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/gP6Bggy/apowersoft_screen_recorder_pro_review.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/yxhdt2A/ninudonuletezosubezuvugeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_b94acf6815fb42a69b4da181619e9a34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3189e664-1096-4198-999a-e20b7a3d2ba3/is_wd_my_passport_ssd_good.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/21040049707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1104c66c-d5a7-4d43-be14-3a53d6082d39/calligraphy_letters_a_to_z.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/advice_for_the_betrayed_wife.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_c04e12a3d51f443aa64b718eda78b38d.pdf?index=trueIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_c222ff6192a841ce85520c5b8c4f61c9.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_21ba50c1db0d4ab88c44f5008241e52c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/757bb7ec-9f6f-46f9-95d9-ac841fdbc483/samipusedonitegeziwam.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/gatude.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/55350379688.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/vokumekejizamu.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/37198167244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f93e0b-25a1-453c-bf8e-fc3ae7023e4e/has_tanya_roberts_passed_away_or_not.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_off0000e066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE066 5196 bytes
SHA-256: e124a9f1721ab3dbea8ae933e14d1401273abfd49265e755555cadca9ec0df6c
font_01_sfnt_off0000f21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 10720 bytes
SHA-256: 15f22ce8814a206ce45e33559371dcc07c80dcda7ff3b670e737e20a39cc9906

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