Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7dddb16fc74d10…

MALICIOUS

PDF

111.9 KB Created: 2021-03-08 08:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f5ab1ad6642bf2e5955caa782ec6800f SHA-1: a8cb6f4b5de2ac4dcdab8830348b8e7ec454dda5 SHA-256: cd7dddb16fc74d108bd21bc96aa6247f9c85f168603cb637402805007cf004c4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to suspicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to sites hosting malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed for user redirection.

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://mezovuduw.ru/award?keyword=crossfit+level+1+training+guide+spanish PDF link annotation
    • https://cdn.sqhk.co/pijajawopoji/hchaP9h/67047444373.pdfIn PDF document text
    • http://vertitribe.store/63376100569ba8k.pdfIn PDF document text
    • https://xebejadeveroj.weebly.com/uploads/1/3/0/9/130969735/nixuzefekazo.pdfIn PDF document text
    • http://my-favshop.online/melody_thomas_scott_childrenq70jx.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/dhfCEts/1954751867.pdfIn PDF document text
    • https://cdn.sqhk.co/rijolumexeb/JcVjjif/renididodovoluv.pdfIn PDF document text
    • http://afracheat6.xyz/when_you_wish_upon_a_star_disney_lyricsjszvx.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/2676669.pdfIn PDF document text
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/rirelikuxuja.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/dhbhhjf/birthday_cake_with_name_and_photo_editor_app.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/kesele_refig_fafujigimajimuz.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/iJHS0ct/21594156021.pdfIn PDF document text
    • https://nedudefo.weebly.com/uploads/1/3/4/3/134389218/pilomagizowozotid.pdfIn PDF document text
    • http://azorocheat6.xyz/mahalakshmi_calendar_august_202000zsc.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/fobupojowojon/call_of_duty_2018_game.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/63221273807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e70c7a-aa48-4d2b-95ad-80e73d6c7651/dish_tv_channel_list_file.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/18276610108.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/72518376708.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/5576218064.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/1783522083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938686f9-8ccb-4a3e-a9e5-00484bcf74e5/94066056016.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/tikunujajo.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_off00016a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A99 5320 bytes
SHA-256: f054231a4f050736e2758e42da7caf6fe967bcfb88991bc03188c509f1a669e9
font_01_sfnt_off00017cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CB6 11548 bytes
SHA-256: e93d595cc8dabd72c1e40cf90806083ea50e82339e1375826e4ff275dfca5e88
font_02_sfnt_off0001a3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3D5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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