Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd3559bdcb37656…

MALICIOUS

PDF

70.9 KB Created: 2021-02-15 16:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 12c18b62739f59a8abd98d08f577f23a SHA-1: 2adb150070c8399d6bdbf53b1e84a23b701673b2 SHA-256: 5cd3559bdcb376564099103ccfa0d23289938f60b83f188121b13054e2964ddb
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=bandura%20social%20learning%20theory%20in%20the%20classroom PDF link annotation
    • http://fb-pageunderreview.com/raanjhanaa_2013_movievaxd4.pdfIn PDF document text
    • https://zogozunenu.weebly.com/uploads/1/3/5/3/135399222/jobaxewopepetog-xodeparukonif-nesomobojapiseg-figodepudawuma.pdfIn PDF document text
    • http://cparta.moscow/47421555570cfz29.pdfIn PDF document text
    • http://goodik.fun/83235888537x50ww.pdfIn PDF document text
    • http://dream-stat.ru/introduo_a_administrao_maximiano28cg7.pdfIn PDF document text
    • http://stat-index-co.com/realismo_magico_caracteristicas5ohl8.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/747088.pdfIn PDF document text
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/zinazosis_vewive_lekikejixanu_sunotad.pdfIn PDF document text
    • https://dekupepevimozis.weebly.com/uploads/1/3/0/7/130738652/5626052df.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/mimuzalupi1trhe.pdfIn PDF document text
    • http://befigter.xyz/apoorva_sagodharargal_full_movie_hd_freec5rvd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/61854105032.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/fififagawefejopuziki.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/hbse_class_12_compartment_date_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/90351293383.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 5504 bytes
SHA-256: 586045e2bb511cf8b96833c24df42cad5703d6a6d541139a4296038cab078261
font_01_sfnt_off0000eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 10544 bytes
SHA-256: 4c2c0650041a15d6271fd86c30b68eebfe41e7d8f91a97f85fee78d203fc7138