Malicious PDF — malware analysis report

Static analysis result for SHA-256 090dc00f999ad092…

MALICIOUS

PDF

75.5 KB Created: 2021-03-08 01:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b97a1f9a4494d56e903b9c34e7e8d9c1 SHA-1: aae53f74f2efae119f44368b2da15354198d1956 SHA-256: 090dc00f999ad092707ab6533978c6380d0d86ff1ab4e1bfb17826388b16f857
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain that appears to be part of a link farm. ClamAV and ML classifiers strongly indicate malicious content, specifically phishing or trojan activity. The document body is heavily obfuscated, but the presence of the URL and the heuristic firings suggest a phishing or malware delivery attempt.

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://jumiwimov.ru/strik?utm_term=fulltone+ocd+version+1.4+reviews PDF link annotation
    • http://minoduzu.iblogger.org/jaseraniwopojokeki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_6005ca0735949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_6027d332db13e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461202/normal_5fe19499d7a87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fcf6c573c73d.pdfIn PDF document text
    • http://nubebukexowi.66ghz.com/cccp_codec_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_6016ec85c2c68.pdfIn PDF document text
    • http://josowivofowog.iblogger.org/30261833087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_9ddd536f17f44d01900ab33128bbd202.pdf?index=trueIn PDF document text
    • http://wisowegu.rf.gd/chernobyl_episode_4_link.pdfIn PDF document text
    • http://bowupezik.epizy.com/diferencia_entre_aprendizaje_cooperativo_y_colaborativo.pdfIn PDF document text
    • http://pizibajavodup.epizy.com/kamitululawe.pdfIn PDF document text
    • http://rorufefujolag.rf.gd/eye_of_the_tiger_sheet_music_guitar.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_c5bd8325467a422a8d09deeefc4f442a.pdf?index=trueIn PDF document text
    • http://zuzojep.rf.gd/sklearn_classification_report_explained.pdfIn PDF document text
    • http://ximawefab.epizy.com/assassin_s_creed_identity_obb_file.pdfIn PDF document text
    • http://pidegesuwi.epizy.com/rubeloresevukujadodigi.pdfIn PDF document text
    • http://dudenakapevawos.rf.gd/zitolivumabisuxowotubevof.pdfIn PDF document text
    • http://potolonufe.epizy.com/pudijubamudowimed.pdfIn PDF document text
    • http://xazitew.epizy.com/recruitment_agency_website_template_free.pdfIn PDF document text
    • http://vejebuta.rf.gd/huangshan_china_travel_guide.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_f11469140aef420b843046c07275c6a9.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_off0000e8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 5004 bytes
SHA-256: 3efa304a03906bcfc0bd66058a0b647314437bb67141bb20ce14f49f1dc5abd6
font_01_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 11336 bytes
SHA-256: e508227d4f58fcfd37eaee9b6c3144d9aafa852f82178d63c89d60fb8b93479d

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