Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bc3efc1a9e0725…

MALICIOUS

PDF

93.4 KB Created: 2021-03-11 02:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d44ab76da6df62554df23576b80ee8a6 SHA-1: 8b9b83a1b19d16de1fb39d3a90dc524dbb859b30 SHA-256: 03bc3efc1a9e07250a693b0f0f6147c421d1fbb2fd148d47a76df3c872e407b9
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for redirecting to known malicious infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URLs point to domains associated with link farms and disposable hosting, suggesting an attempt to lure users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=catalog+%25E0%25B8%25AA%25E0%25B8%25A7%25E0%25B8%25B4%25E0%25B8%2597%25E0%25B8%258B%25E0%25B9%258C+%25E0%25B8%259B%25E0%25B8%25A5%25E0%25B8%25B1%25E0%25B9%258A%25E0%25B8%2581+panasonic+2020+pdf In PDF document text
    • http://takovod.66ghz.com/42142130931.pdfIn PDF document text
    • http://stat-index-co.com/kindle_epub_oderadyft.pdfIn PDF document text
    • http://kuworekokinig.medianewsonline.com/call_of_duty_cold_war_upgrade_from_ps4_to_ps5.pdfIn PDF document text
    • http://ionatr.space/how_to_trade_divergence_in_forexhg85m.pdfIn PDF document text
    • http://uanews.website/zumifuf6sebz.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/aberdare_cables_catalogue.pdfIn PDF document text
    • http://jabekigufu.22web.org/pioneer_vsx_521_k_factory_reset.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/wavuwejane.pdfIn PDF document text
    • http://digitalmicroteter.xyz/towazuriwekasalnw0g.pdfIn PDF document text
    • http://futegejetebe.22web.org/bushnell_yardage_pro_1000_instructions.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/good_romance_books_to_read_for_adults.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/aja_ki_pro_ultra.pdfIn PDF document text
    • http://cosmicgig.com/tewekonatx35b3.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/advantages_of_direct_rule_system.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/how_to_transfer_from_a_uc_to_another_uc.pdfIn PDF document text
    • http://datingdate.site/35115892481folx0.pdfIn PDF document text
    • http://dlkmvkoenv.info/reformed_theology_vs_calvinismvlplu.pdfIn PDF document text
    • http://bnl-jobs.com/24034376271qb78i.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lidiremuvuzanas.rf.gd/tijewamofapami.pdfIn PDF document text
    • http://dodujis.epizy.com/ribaxitaz.pdfIn PDF document text
    • http://givaneja.rf.gd/50499770322.pdfIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fd57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFD57 14352 bytes
SHA-256: b323e55390a096db44164251e96584d57892cbbe58d0d420b1ac5a17ea762d04
font_00_sfnt_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 5192 bytes
SHA-256: 42814d0835ec5dba99fbfc3bc3d218524b57fc1e5dd28b228ac631841360cec8
font_01_sfnt_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 7780 bytes
SHA-256: e4c0d8833ff4b8827e153a107b1668439f7329d8072fe03eccaee7ceae875197
font_03_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 15240 bytes
SHA-256: 9a08f3902616dea6e760e21325320788043229234e915fe483850db050e96e48
font_04_sfnt_off000154ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154EF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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