Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8a29ce92e56099…

MALICIOUS

PDF

68.2 KB Created: 2021-02-18 18:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f431c94a38af552b64aeb822fd9d44b1 SHA-1: 522bcbc45461f9fb7c99a09dec5592b3a000d6b0 SHA-256: 4c8a29ce92e56099d291a55284dbe082a2ecbbcb0fee2efb4f5f2ebaad329efd
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=super+smash+bros+3ds+rom+espa%25C3%25B1ol PDF link annotation
    • https://jarofipe.weebly.com/uploads/1/3/1/4/131408229/pogimiwubagas-watukusujuzi-xukovad-wemizowubodukon.pdfIn PDF document text
    • http://cryogen.me/zuredatepegk3dx.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/dorazugu-mapaz.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/gevopiw-sarusajafulijig-gaketewizowopib.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/nitevopexibej_gerebotikijubu_bowikukas_verafuxuk.pdfIn PDF document text
    • http://kulinar2020.site/pubuturexawezolunelibugod5qfh1.pdfIn PDF document text
    • http://lovelid.xyz/megetineluzu76y4u.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/ZOujhVe/26673655055.pdfIn PDF document text
    • http://busurman.space/62520282128jxmap.pdfIn PDF document text
    • https://lumekagaxegi.weebly.com/uploads/1/3/2/7/132712489/7378327.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/pirosisob/attagasam_video_songs_in_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/chori_chori_chupke_chupke_song_krrish.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/pathophysiology_of_acne_vulgaris.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/97290215663.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/95853689445.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/vekosevotomi.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/best_android_phone_2017-_18.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/21351318836.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/google_chat_format_text.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_off0000cb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB30 5816 bytes
SHA-256: b7dc7503982930f08a81b7277f0a14557a90432182ea9a8c4f0db60b23cc735a
font_01_sfnt_off0000de82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE82 10524 bytes
SHA-256: dbb968b0f1cee9ae1c400ccfa93ed7d550e0e051222239a56328cac41f7b7262

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