Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e93f7630bfa9232…

MALICIOUS

PDF

76.1 KB Created: 2021-04-29 17:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9ea581992f987621f6526b839b84a806 SHA-1: 6d0742659c293622688643f3a03fc386972c723c SHA-256: 4e93f7630bfa92323c03bd2e0a0c57f12a458113f6452e66a7781800d868fea7
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a malicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically identifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'resistance training exercise guide pdf'. The embedded URL is the primary indicator of malicious intent, likely serving as a landing page for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=ptp+resistance+training+exercise+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5fd387858795d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450519/normal_602c0bd9c549c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_60312a0654706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_604322ab9236b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453540/normal_601bdc4a92940.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb13fee-104c-4341-8ff4-4beeab7b7a2c/south_african_food_calorie_list.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/rinnai_tankless_water_heater_valve_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/batosinos.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/42887251533.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/38995762385.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/the_forsaken_tower_osrs_quest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/78540068868.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/sazofidorerumatisunuroj.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/amparo_indirecto_ejemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/ryobi_circular_saw_guide_bunnings.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/18762017274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65501dce-feee-4218-84aa-fb38da65d762/fluval_fx6_bio_media.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/89430840320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0bcbffc-5a9d-4d79-b3ec-c2e1c7264581/87133694662.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_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 5360 bytes
SHA-256: 486a389fbde0f96d039cf9c03cb7687d24073e790a11b64775305463c6110760
font_01_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 10952 bytes
SHA-256: 66694842c825ff94b881d4e864760d65814f0f4fa9ff6d12c6978a0c469f4192

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