Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ca3e824b3d6480…

MALICIOUS

PDF

68.2 KB Created: 2021-03-06 08:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 33cbee909fd1d123997244e44bac2782 SHA-1: 6b47ca5d667b8a718afbb9b04f6caa2a0a375841 SHA-256: 85ca3e824b3d6480e9e61b9fcda2cc87ef5fd5ec60d758f8bb822fefc318d977
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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://fokemale.ru/wix?keyword=qr+scanner+apk+for+android PDF link annotation
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/9ad38281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379359/normal_5ff034e71f7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_6037eb5f12d32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_5fe303962883b.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/6291080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5fcfadf66777e.pdfIn PDF document text
    • https://zonidazoledod.weebly.com/uploads/1/3/1/0/131070441/ligupobixewij.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/lodadeladetug-pujumomi-nunexifeni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472479/normal_60071194461d6.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/c24b927b6b63ab6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383452/normal_6005522eef034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_602214d04ef6e.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/foneniz/expanding_single_and_double_brackets_worksheet_tes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc88419-cd76-4e8d-a654-2c6b719f2808/retanotugoxebavupe.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/green_eggs_and_ham_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/30895613786.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/love_poetry_for_husband_and_wife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a54af57-722f-4dc2-9654-17d4fcf1dcc6/planewalkers_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/32994548048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b154a2-3ae6-4b7b-9250-4510a717d18a/52694889189.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_off0000cf31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF31 5244 bytes
SHA-256: ea9965f538db2439a54f8d63e3db5b45d6a60a83a76e608a6975e3efef4627b0
font_01_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 10208 bytes
SHA-256: 497f1f421d8ceac0afb1bacb369094c0ccc1fefb4d4441374c8e4fa818307eda