Malicious PDF — malware analysis report

Static analysis result for SHA-256 c491a0d48a8d7a0c…

MALICIOUS

PDF

74.6 KB Created: 2021-02-09 19:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b20620a4352c5154ff3b62f630aac8a SHA-1: b44838d95d78af36651823d49d9557edf706f809 SHA-256: c491a0d48a8d7a0c5397c7e35f59c551beab62b84dbe23a448546b559d93daa6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jacksth.ru/aws?utm_term=connected+no+internet+android+10 PDF link annotation
    • https://cdn.sqhk.co/bomumuxa/jjgd4dL/best_minecraft_survival_house_download.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/rabowevamarabajav.pdfIn PDF document text
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/8173602.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/8141966.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/6982697.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/dWjbGih/19720457272.pdfIn PDF document text
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/zotapixiwakidi.pdfIn PDF document text
    • https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/56baa3f613bfb.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/milifa-benovivepira-kebatu.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/robumuduluwise/45409237310.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/62355553268.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/xazimolitefojubevo.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/80200775849.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/xufetowumalajinafurut.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/assassin_s_creed_identity_obb_apkpure.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_off0000e801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE801 4820 bytes
SHA-256: 9e0167e78ff984bbe132dbc095540d2cbed2d0f7b704ed8b092aae031f2589de
font_01_sfnt_off0000f86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 10952 bytes
SHA-256: e6e98c9867119f9694ce64483f50784d11583d0dc4516b200ccd5fb5e2966867