Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38a738e9bff8943…

MALICIOUS

PDF

73.9 KB Created: 2021-03-28 01:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 37f089789182d4e0aed1a99b45462f4a SHA-1: c84ed56f23ba38ffbc54465479cbe2dd3a98d20b SHA-256: e38a738e9bff8943dd60f11d19d108a5805066cfa1ec616cdbb28745238666af
186 Risk Score

Malware Insights

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

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 0.9991

Heuristics 6

  • 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 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.
  • 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/strik?utm_term=lg+lp1015wnr+parts+diagram PDF link annotation
    • https://cdn.sqhk.co/pigalixow/i6Tiibf/53349267631.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/ahxggja/33096159523.pdfIn PDF document text
    • http://waxevamebe.22web.org/94899196821.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/dwHRNgf/mekipup.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/ggeheqB/pixel_gun_3d_10._2._1_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/1igdkLN/36997957806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_5fda90a02f66402a9e538037d176a884.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71406db4-f47a-4394-b647-7d6f46655775/romeo_and_juliet_act_1_scene_5_script_summary.pdfIn PDF document text
    • http://tiripetejakiwa.rf.gd/10460626542.pdfIn PDF document text
    • http://gejebegujisutil.rf.gd/mitosis_and_meiosis_stages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb43bc38-e9ac-44be-91d3-c21c4df16071/64636777826.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_ec15a8644eac434a9256ed6b55ccf09b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/39381cf2-7131-41c6-889f-cb84a864ef1b/navy_seal_training_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9b9ca8-331a-4548-a0b4-10a24af419b6/jetegiwimopaziwamolaburap.pdfIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_c9387a62cfae48298cfb8ef2d6cd36d6.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_c256be3c64224f199f58dfdede21069c.pdf?index=trueIn PDF document text
    • https://9cc03a5b-da86-4a44-8f3d-15f7580f9586.filesusr.com/ugd/cac91c_4920f20fe06c457cada5e376d47e77cd.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_a31fc6ae273b43f99879d533600b5405.pdf?index=trueIn PDF document text
    • http://juzodut.rf.gd/lugotunuzevedonerof.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_32f421dc34e74587a7d4b55c7c3efc8d.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_781f93a40b2c4b139167c973a9573ab4.pdf?index=trueIn PDF document text
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_7be23485b5874b4e8432f23a997f0853.pdf?index=trueIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_5d2817f7c798407497d2273b4311d5b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e817dbb3-f417-4dee-bf73-5745c8bace15/modernist_cuisine_mac_and_cheese.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_29ffeeb4aba54a09bccbe4661c30fbbf.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_off0000e19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 5632 bytes
SHA-256: 3190acc5eec30f9dd7bbb0153a2e20170c3dca4734182bb6356a86fdd9bd38cc
font_01_sfnt_off0000f4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 10992 bytes
SHA-256: ad5c5c443082fc9dfc0ad559de5e429393ac2a6579cec072c7c9b1303a3d84a3