Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f20b7feb9613b09…

MALICIOUS

PDF

77.2 KB Created: 2021-03-22 09:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ca9470d7bff41325a8f5a83842672323 SHA-1: 5b797359ef9001d3a77a19dcafcb9c98a66b66d2 SHA-256: 7f20b7feb9613b0912354b6d841d548a4c5625fe506c2d093252f3f1c42ffdc4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which are dynamically generated and point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary external URI, 'https://baarspo.ru/strik?utm_term=does+bose+sounddock+series+3+have+bluetooth', is likely intended to redirect the user to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=does+bose+sounddock+series+3+have+bluetooth PDF link annotation
    • https://ruminugovukaka.weebly.com/uploads/1/3/0/7/130740017/jeluzufilujovowe.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/mojebofarer.pdfIn PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/rubebopufokisime.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/transistor_amplifier_experiment.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
    • http://romofimor.onlinewebshop.net/lajuvone.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/rilag.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/43216625409.pdfIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_317a2f46026849e884ae108d90d1517d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/what_are_the_different_types_of_iphone_10.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/timijomoxekenidib.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/upsc_answer_key_2016_csat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7f18a6-afec-401b-8595-73d613e9b69c/75048822758.pdfIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_71fdde3b24844bf5a9fbac2a900d66be.pdf?index=trueIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_70574d7548d14ca5a6d0a5b16fcc3261.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e160cd-d5aa-46ff-82a9-3e89a26c67b4/how_to_take_apart_graco_pack_and_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf28d7e1-43dc-406b-a25d-1c6b61b18c9b/operating_systems_list_in_linux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75908030-8988-41b5-b386-763759f35430/jifamikixebotuzojadapi.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_ef42c0764553493da74ce9a3ae18af89.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_fee2f568c75946afaf3441fefb890cff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/028d66e2-212c-45cc-8b48-6494cb4ad72a/88724725096.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_off0000e1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DB 5336 bytes
SHA-256: 6918a37b0c243d35ce7801470fc4e92dc225dd8ee157bd5293637ced8c65a261
font_01_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 10420 bytes
SHA-256: 0f1ad207957df0ba1f0126febea102dc2884e8846a1d649bcd7475ffdaebad53
font_02_sfnt_off0001179d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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