Malicious PDF — malware analysis report

Static analysis result for SHA-256 8246c084a53199e5…

MALICIOUS

PDF

82.2 KB Created: 2021-06-06 11:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0aacc8b40e6c5b686fbf0b9497f74f2e SHA-1: 21bc267ceb09732e1ef1a495758cbf832e498449 SHA-256: 8246c084a53199e54b8acb66a5682b79bd47e404dd652dff7f906ed10abe829e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://nomylo.ru/pbw?utm_term=google+%25D0%25BF%25D0%25B5%25D1%2580%25D0%25B5%25D0%25B2%25D0%25BE%25D0%25B4%25D1%2587%25D0%25B8%25D0%25BA+%25D0%25BE%25D0%25BD%25D0%25BB%25D0%25B0%25D0%25B9%25D0%25BD+%25D0%25BF%25D0%25BE+%25D1%2584%25D0%25BE%25D1%2582%25D0%25BE PDF link annotation
    • https://nubawobadeg.weebly.com/uploads/1/3/4/1/134131997/5eca5262867aaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff019776e1ac.pdfIn PDF document text
    • https://getazepamotiga.weebly.com/uploads/1/3/4/3/134352900/zulapul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454040/normal_5ff21db672afc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_600d2f2ee9f6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_600d55b7ca3a1.pdfIn PDF document text
    • https://kowumawadixowiv.weebly.com/uploads/1/3/4/8/134888970/vojosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_6021fc6a47e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_60136148d6933.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://uploads.strikinglycdn.com/files/8716e8cb-72ea-49ff-92cb-a9d94223c360/lesip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001964a4-a321-4341-9f69-dd8bb969edf6/bugosid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db3c062-51ec-4845-b74c-16cf054e64e2/how_to_get_rid_of_dark_acne_spots_on_face_fast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadc8ab8-a5e6-42ca-a73a-2500dca6d7e5/tipekaxifegeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9610ff3a-e65d-49a1-95c3-61344ff9080e/2006_gmc_envoy_xl_engine_5.3_l_v8_denali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a26426f-44e8-471d-a460-9db1be403b86/royal_navy_officer_training_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1771557a-733a-495e-8235-4ba12531f9ee/lannee_philologique_abbreviations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa86621e-6bf2-406b-9228-20bb0f723f7f/nh_lut_bo_ton_ng_lng_lp_10_vietjack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed30ad66-3c78-4979-adee-66421e22b443/weight_watchers_food_scale_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c5cbf7-c37d-45e6-b1cb-a043ed54cac7/44465203325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4434b7ee-ee29-4a0f-8af3-62200a97905f/the_keto_reset_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1262b42b-01c5-4d40-8532-9c873ac04c60/sawivoboginevumajepuxen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8296c950-b7b9-43fe-9708-7b0f87406475/where_is_the_filter_on_a_magic_chef_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5436c1-ccc1-4df5-9dae-885fe8c83933/jedimexi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 5588 bytes
SHA-256: 68442acc709cdfb2781af12673b842e153be57f2963826c10e62e5827e526550
font_01_sfnt_off0000f327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000fbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 14772 bytes
SHA-256: dcf16ce69ba8738193ed295b2b329fe7b27532681e6c9b381494f5d52d6d232d
font_03_sfnt_off000129ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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