Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48ec1f32a27a344…

MALICIOUS

PDF

113.9 KB Created: 2021-03-08 05:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f7c52542fc4f6bfe6ea731a6e5e4d813 SHA-1: 4c0abbf7e2a1fc69281fd7236bf3a85577970afa SHA-256: c48ec1f32a27a344dd8760925daf09e368afaef944ce0bcf3abf999d5e0d13c7
134 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. It uses an urgency-based lure. 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 0.9984

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/wix?keyword=ultimate+reset+program+guide+pdf PDF link annotation
    • http://priz24.site/xumaguwijowogiwadukage0cc3u.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/jaZmtdG/25789990913.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/3sge_beams_manual_gearboxduit6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5ff7cc117f1e8.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/VwWOhbG/north_star_orchards_westmoreland_ny_13490.pdfIn PDF document text
    • http://apkweb.net/usps_domestic_mail_manual_2020fdc8a.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/gdjrunU/dafirigetalog.pdfIn PDF document text
    • https://ruwagifixub.weebly.com/uploads/1/3/4/0/134013037/dosaved-xugejidutuxe-gugukunopiz-zamokin.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/hfhaAgj/my_talking_tom_2_application_download.pdfIn PDF document text
    • https://zulupilasafa.weebly.com/uploads/1/3/1/1/131164294/rademebomu.pdfIn PDF document text
    • http://everydays.space/frozen_2_2019_full_movie_freeevbxf.pdfIn PDF document text
    • http://bt-management.website/pac_man_world_rally_ps4pd115.pdfIn PDF document text
    • http://prizinsta.site/jilafop9cwgl.pdfIn PDF document text
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/2824ecbfd44963a.pdfIn PDF document text
    • http://goossyy.online/kabogow5ili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473322/normal_602d63ea16d4d.pdfIn PDF document text
    • http://ukranews.icu/sizogajezujuxupklim9.pdfIn PDF document text
    • http://bluebadgeform.com/star_wars_space_ships8auim.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/d5jaaju/29157713165.pdfIn 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
    • https://uploads.strikinglycdn.com/files/68214ab4-3bac-4839-b4be-f85facb083c9/list_the_8_stages_of_the_life_cycle_of_a_fern_plant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b5485c-8faf-45f9-86da-a32ad54b3ede/11067802975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87190a1a-6c8a-4f4a-bb25-3a43c93d37cf/passion_and_purity_free_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a317e7-0bc9-4bab-9810-597cd6bcaeb9/how_to_row_faster_crossfit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04a09fd-c94e-4cec-87af-3ebced80fac1/sony_tmr-rf985r_power_supply.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175A8 5128 bytes
SHA-256: 77aec18082a394db65aedd5951726e0fa4706746d98e39e714653f26668121d7
font_01_sfnt_off00018716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18716 10476 bytes
SHA-256: 4af481d9ef02b98e07a815a555ef2b77fb64999294dd61f89ef4aff65590a7a2
font_02_sfnt_off0001aaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAF0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230