Malicious PDF — malware analysis report

Static analysis result for SHA-256 58072726eecccbd4…

MALICIOUS

PDF

77.7 KB Created: 2021-03-13 17:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 70ff5bcffb37f619b23b0714d819b2e6 SHA-1: 2958ca99a36f7e7f8f330c630503134823a8d1a3 SHA-256: 58072726eecccbd42f58645ef5c817fe54336de49cf7abde3a9906d24380e330
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though partially corrupted, suggests a lure related to gift wrapping, which is likely a pretext to drive users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=how+to+wrap+a+present+in+5+steps PDF link annotation
    • https://cdn.sqhk.co/sixajuzap/jShfgcV/45963765120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_603fde7013946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491157/normal_6032a0809a640.pdfIn PDF document text
    • http://joy-todays.online/40813522954ds5i7.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/92211097777.pdfIn PDF document text
    • http://aycotoro6.xyz/geloxuladomaxedejop5s2vl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495409/normal_5fcdf89c29042.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/uXBtidM/city_rider_scooter_review.pdfIn PDF document text
    • http://milesnires.xyz/2953031025iwktw.pdfIn PDF document text
    • http://zujewap.mygamesonline.org/parrot_ck3100_reproducir_musica.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/holt_chemistry_textbook_answers.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
    • http://lojubefogugiku.onlinewebshop.net/daihatsu_sirion_2020_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/sarowojejid.pdfIn PDF document text
    • http://tibutariwu.myartsonline.com/l_amore_ai_tempi_del_colera_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/investing_in_canada_plan_progress_report.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_801a590c454f4944b4c641192bcecb42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/art_history_timeline_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/ieee_access_submission_template.pdfIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_227d529f100a4dd784782cfb1eed6cee.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 4748 bytes
SHA-256: 8642d00217a6638124768543729aa9b83568d31433122a5e65fafb0608043a5b
font_01_sfnt_off0000f7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 10652 bytes
SHA-256: 7232c15b01c6ae51c16cb418a3895db4e6346fd96882f5df8603c8e293c2adce
font_02_sfnt_off00011ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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