Malicious PDF — malware analysis report

Static analysis result for SHA-256 e613744f1b66c0ed…

MALICIOUS

PDF

76.8 KB Created: 2021-03-19 05:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8c2f27d652fc6cd7c57c59e001c068b9 SHA-1: dcbd828751c39a7f05cc65f33cb0fed4ae1cf390 SHA-256: e613744f1b66c0edf8f6b9e188da7f57094aab300315567013a55056e7e7d44b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting and acting as link farms, suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, contains text related to 'Android auto not connecting subaru', which is likely a lure to attract users searching for solutions to this problem.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/123?utm_term=android+auto+not+connecting+subaru PDF link annotation
    • http://regse.website/919745956225jfa.pdfIn PDF document text
    • http://myyshooop224.site/rumevumipikukhpduw.pdfIn PDF document text
    • http://hyipinvest.site/shark_rotator_professional_lift-away_vacuum_reviews1tjnm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5ffbbe017203f.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/hhgiz6C/vumisuzulojuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454968/normal_601ffded14aa6.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/67976685048.pdfIn PDF document text
    • http://ctuxuu.com/free_mp3_downloader_for_android_apk3gdn0.pdfIn PDF document text
    • https://cdn.sqhk.co/tipekafomube/gjoMB7N/depunozasitigeropim.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/FalhbXV/66659477618.pdfIn PDF document text
    • https://cdn.sqhk.co/vusunuvaka/ifk5hfK/update_android_auto_in_car.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5fdc4fb732204.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/bhjjgzt/5439104774.pdfIn PDF document text
    • http://bogplaktnc.fun/sifumasibimogt69xb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/balanopostitis_tratamiento_adultos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b003f307-90e2-4b94-be48-2ab018e97db6/how_to_read_lausd_report_card.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/zebegesinarosinube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825b62a4-ddc9-4dac-98e9-259d9a9aa61d/topakujewusot.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/zexideravenozajawid.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/1_what_is_the_main_idea_of_the_gettysburg_address.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/mibuzexaj.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_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 5204 bytes
SHA-256: aee194e19b74ee54f5dc41897ca48d16d599ff8d0dde708a0f285a3f47dc5d7d
font_01_sfnt_off00010089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10089 10996 bytes
SHA-256: 2eec7caf9332a5c69fa7f428732c9c1b42c37720bb7ae49bafe529d60f8ff4e5

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