Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb1ffbbce63af70…

MALICIOUS

PDF

89.1 KB Created: 2021-04-02 05:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e6470d03a3df315abe8bd193ffdb4a5 SHA-1: 7ef430c1507fb5fffe49516fcaabc5840086f6a0 SHA-256: 7eb1ffbbce63af708d9ba73a8c711d3bda7ff0cde57cd72e7991c1584378ebe9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware distribution lures, likely leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=how+to+write+in+pdf+adobe+reader
    • https://mojebope.weebly.com/uploads/1/3/4/6/134609081/dadepi.pdf
    • https://soxagunolipug.weebly.com/uploads/1/3/4/8/134887217/093a2f916.pdf
    • http://i-men.ru/greenlight_nypd_setwpil7.pdf
    • https://kokujilu.weebly.com/uploads/1/3/1/4/131453241/1565523.pdf
    • http://weareanonymous.org/35973398692y3k9v.pdf
    • http://kprovk.xyz/singer_sewing_machine_9410_manual8514f.pdf
    • http://tilosag.mypressonline.com/cooling_tower_book.pdf
    • https://manatelagaren.weebly.com/uploads/1/3/1/4/131437493/pelegidebape.pdf
    • http://zijojot.22web.org/meaning_of_education_system.pdf
    • https://doruvovet.weebly.com/uploads/1/3/2/7/132740873/8487437.pdf
    • http://reduslimitaly.website/samsung_galaxy_s3_neo_android_5.0_upvp8n7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tifavamifikas.myartsonline.com/53208283807.pdf
    • https://s3.amazonaws.com/wexukufedepim/check_busybox_installation_android.pdf
    • http://fapibudu.epizy.com/kivuli.pdf
    • https://s3.amazonaws.com/visagogijulep/gafafuninazojif.pdf
    • http://dorenibe.rf.gd/didijixuwamelopa.pdf
    • https://uploads.strikinglycdn.com/files/bc805b1e-2408-450a-a90e-f868807fdb39/lemitubufelenugajufizote.pdf
    • https://uploads.strikinglycdn.com/files/de3c480a-0626-494a-8479-022ebe06895e/28059700679.pdf
    • https://s3.amazonaws.com/pewibim/12820417147.pdf
    • https://uploads.strikinglycdn.com/files/49293e2d-8782-4e70-8e94-c9ea82c825f4/honda_gx160_pressure_washer_manual.pdf
    • https://uploads.strikinglycdn.com/files/70ff498b-5084-4cf3-b506-d647002330dc/canon_200d_mark_ii_specs.pdf
    • https://s3.amazonaws.com/ninazarila/1519222344.pdf
    • https://uploads.strikinglycdn.com/files/e3f21971-3663-4e3b-b277-49e480f55b9d/netixegenozewukudulum.pdf
    • http://pijosufun.myartsonline.com/sarov.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001135b.bin
d4c466e0eed3030dce31488cd4790e2b0497aac5d97fb799fbb503817e6adc42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 4804 bytes
font_01_sfnt_off000123bd.bin
ffadc21ca7b610f14e4a456d42ec7c6e18274ffbb6a64af6e561d6d4cb3e8162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123BD 10836 bytes
font_02_sfnt_off000148c8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148C8 4324 bytes

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