Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18b2ccad8e38948…

MALICIOUS

PDF

67.7 KB Created: 2021-09-29 04:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7ca2835507a36f2f5f2a3226dc6e2174 SHA-1: 893cb73fc22073766f2a070e5a4b9ebb985cc178 SHA-256: c18b2ccad8e38948be8442edc288570c804dbf3ef691b2c494d4074ac18d95f5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains multiple embedded URLs pointing to potentially compromised websites and an IP address, suggesting an attempt to redirect the user to malicious content. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document with an action trigger, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/faa69a6b7a351ab4ee38089acb4ed380/lenojijezesetolenupada.pdf In PDF document text
    • http://wintec-samu.hu/uploads/files/sarig.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/malasugekevovumeza.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/jadexaxedun.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/82433578565.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/26370648858.pdfPDF link annotation
    • http://wuyioutdoor.com/userfiles/file/13915807732.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355dcddb138---67404430477.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/sanas.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/38133415962.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb344df133---13250913311.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/woriva.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/munukaxubew.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/49745114893.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/fonekumega.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-25/images/files/zukifot.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/vozonijesuro.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/tulozulavurafexufegoki.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7995796466.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/51000982253.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338e7534e6a---fosatowamewomavenotit.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/fefogukuvoza.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/68938364795.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/kekisesuri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dashing+khiladi+4PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC706 10248 bytes
SHA-256: be21b8798be0a2982134ba46a91a6e380abccc97b10db97c927bd46c1c47466e
font_02_sfnt_off0000ddb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB0 14508 bytes
SHA-256: aa690268a7bf4e218f17c464259c002fc194d55153b276b76d25b7c9a5ccaf6c

Open this report in the interactive analyzer, or submit your own file for analysis.