Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ca6e5d4cb7e8a4…

MALICIOUS

PDF

71.8 KB Created: 2021-03-12 01:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e6f3d051f866de4e356903e3e930d3f9 SHA-1: 62d445bf974e7de21cc3a473ce4e20ae9b4b81aa SHA-256: 88ca6e5d4cb7e8a466b583e312d5f173a1eb509092234304c192717ed7c842c1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/wix?keyword=growtopia+hack+tool+android PDF link annotation
    • https://migijulomav.weebly.com/uploads/1/3/5/3/135394851/4262962.pdfIn PDF document text
    • https://zaloposigino.weebly.com/uploads/1/3/0/7/130739621/nimize.pdfIn PDF document text
    • https://birexekexujivas.weebly.com/uploads/1/3/1/8/131858685/rimitafodoxokuxisam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefuxuxoj.epizy.com/bibosil.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/xawejagutikililajap.pdfIn PDF document text
    • http://dojizanutirisap.rf.gd/animal_farm_final_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/polaroid_photoshop_template_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/thuthuka_bursary_application_form_for_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad7aca8-9f5f-40b5-a031-4492efb264aa/dubabisovutevenijafir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbf9f02-73cc-4e4d-b788-40a865f4f6cb/80177901982.pdfIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_8a5a476a100b4434af1c2460e748844c.pdf?index=trueIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_fc66e91f329d4405904cb36db79e8c1c.pdf?index=trueIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_cabb904736f84f03bb21fb8fd7c369e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7cf1bd4-7c04-4701-9f90-2823f63a9772/79582670724.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_6b26f704d50d47b8a893c8dbc43a5646.pdf?index=trueIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_9a11a82ed6c3433fb66df5efcc9cd5aa.pdf?index=trueIn PDF document text
    • http://setuvufijub.epizy.com/apple_carplay_and_android_auto_dongle.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/zivibojexajixela.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_c7659ce69ee949b4bf2549f9d414e500.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/southern_charm_savannah_episode_guide.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_a11095dde81c4d83964eab4e36ceac11.pdf?index=trueIn 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_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 5168 bytes
SHA-256: 85a2e272673fa8473c0c77cd39e529a2322e3e9074626565c44c1ae7d7c50705
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 10224 bytes
SHA-256: 2f1f16fdcf060fda8f7caa17bd070c0f1a8026500388318b891cd4e6342d1d16

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