Malicious PDF — malware analysis report

Static analysis result for SHA-256 e885444d35e4f56d…

MALICIOUS

PDF

89.6 KB Created: 2021-02-26 17:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0917f4867e95c6d68f42502c4215ec39 SHA-1: ba6905e2efe37adc270758b4cf10b6c6f2b6823e SHA-256: e885444d35e4f56deaa4275a31adae3fb7ce7a31b84a0f1a6a1807f26c0323a3
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a link farm on disposable hosting and a high ML classifier score. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially malicious external sites. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/123?utm_term=on+mobile+ka+matlab+kya+hota+hai PDF link annotation
    • http://getbuiss.online/sap_basis_tcodes_with_screenshotsdl1vu.pdfIn PDF document text
    • https://cdn.sqhk.co/nadizolobe/Y6y3qhf/beats_x_problems_charging.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/Y6jfkha/33835806575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378167/normal_5fdf9932804ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_6036f5a4a0227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451756/normal_6003d020b78a6.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/jaBQBhg/politics_and_the_english_language_summary.pdfIn PDF document text
    • https://diritirafimiwav.weebly.com/uploads/1/3/4/3/134376035/85b5bd0c7aafde1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443803/normal_60112d6fee3f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_5fe6f4e4d8348.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468571/normal_6002aacf7bd12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_60215dd853425.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/8f16eb696d4c.pdfIn PDF document text
    • https://javimitama.weebly.com/uploads/1/3/4/3/134349319/gigawetuxufeto_fakulodegojad.pdfIn PDF document text
    • http://educationonline.website/video_eeg_report_samplehvusj.pdfIn PDF document text
    • http://priz24.site/86788433864rq7fm.pdfIn PDF document text
    • http://spain50off.info/high_performance_liquid_chromatography_bookm975s.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/cjhOghH/one_year_calendar_template_word.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5fcfae25ad5fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fe30ab019883.pdfIn PDF document text
    • https://dimafaxatabevex.weebly.com/uploads/1/3/5/9/135991177/12b9f2f4c73f4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70D 3056 bytes
SHA-256: ea06d43ca762cae10bc562153dfc65dc7d01a79db1067adae3b955ccf3430762
font_01_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 4984 bytes
SHA-256: 35fc3e8852ba50caad21b60b8e2f173bcf561ab3910189600b791074e59ee129
font_02_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_03_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 10516 bytes
SHA-256: ec8ad16239e5f70cbb0c758abed89d0908ca35f369866de2d50f5b3e69c2d6ba
font_04_sfnt_off00013272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13272 10780 bytes
SHA-256: 9ef5d078114ba2bb50725031e7bcea9cdc522730ebf77fc9fc03deaa2d020f25