Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3169bcb073480f…

MALICIOUS

PDF

73.4 KB Created: 2021-03-23 18:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 99677e2be8b73355145a3f22054828d5 SHA-1: 98a376d6a4de8d82f5c83736f1baedaa7d572877 SHA-256: 1a3169bcb073480f1d59340097d8a553578f7226f6c8e4fcb9d1dacf88719936
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=barcode+scanner+android+programmatically PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fc98da30e972.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/dudinutokevid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_602c46b4cfbaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_6015c47dcc5e6.pdfIn PDF document text
    • http://bitejodimoni.iblogger.org/11940805505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460473/normal_5fcba1552d521.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/kotudanawi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/521caa9c-1da2-4220-a24d-eea6076bd35c/ps_vita_2000_new.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_ce986270a0f24e548ba1deb8701fbcdb.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_18dbf92230b74d1995712e7d758c618b.pdf?index=trueIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_79328a8adc3a4ac791a9cc9090f6954b.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_45676535fdec46ea82aceed1222b9106.pdf?index=trueIn PDF document text
    • http://lubelulezafi.rf.gd/48922368295.pdfIn PDF document text
    • http://xidozex.epizy.com/ge_profile_microwave_light_bulb.pdfIn PDF document text
    • http://vorenetizufumuj.rf.gd/4597946034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1119f363-2246-47cf-902f-8eacd6907a2c/mavonexovit.pdfIn PDF document text
    • http://gakenefux.rf.gd/cubase_5_tutorial_recording_vocals.pdfIn PDF document text
    • http://webidiwotew.epizy.com/52545520298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b806656-5b7a-435a-93a3-112fa5f6789e/vekosajomipet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe6115a-703d-42de-9acd-74ee51c1c199/sixteen_basic_ukulele_chords.pdfIn PDF document text
    • http://lumipanu.epizy.com/telufizoxanuf.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_b16608c92c764438aa403e7db62781a7.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_off0000e0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 5544 bytes
SHA-256: a3874bb267f40dda01e00e56823fed1c19c0e7874e71b2aaf483005b651d489f
font_01_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 10768 bytes
SHA-256: e991f8ab38b4e7aa98eee75c84158fa7fb194181125fdfd8772d502054ea182c

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