Malicious PDF — malware analysis report

Static analysis result for SHA-256 6042cf512b3b0782…

MALICIOUS

PDF

79.4 KB Created: 2021-03-04 05:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 833369aaff71c2841f70bb03b87a12cd SHA-1: 17a4b6c62fe9e2489345a798207638f5538dc8b3 SHA-256: 6042cf512b3b07828fd4b8ebbf9e26737f7b663c28569930ce4b20d156825056
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detection and ML classification further support its malicious nature. The embedded URLs likely serve as lures to malicious sites or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=jersey+shore+season+4+year PDF link annotation
    • http://raxewaponoxiv.mygamesonline.org/65699928890.pdfIn PDF document text
    • https://tonikajolokoge.weebly.com/uploads/1/3/0/8/130874266/wazenada.pdfIn PDF document text
    • http://jovekigapovokeb.22web.org/singer_promise_ii_bobbin_size.pdfIn PDF document text
    • http://idealica-italiaofficial.site/beery_vmi_assessment_reportmdj05.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/6536260.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/zuveto.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/95752883354.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/navoburarovada/wenadufozub.pdfIn PDF document text
    • http://pimorem.epizy.com/37000463615.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/fema_is_158_test_answers.pdfIn PDF document text
    • http://jofewizabo.rf.gd/26221429837.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/what_juice_plus_capsules_are_best_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/42750982319.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/minecraft_skin_template_steve.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/how_to_do_a_double_treble_crochet_stitch_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/finding_slope_using_standard_form.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_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 4580 bytes
SHA-256: 296402d680477fe2fde377054b9c8947421109c3d4dae5ee82deec7e7cddb8bc
font_01_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 10516 bytes
SHA-256: f0f1f3ed0cdabcf79632ec54ececc89ad08edf1e0d4f62ae7431fbaad4efabeb
font_02_sfnt_off000122cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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