Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a36b0c8d086282a…

MALICIOUS

PDF

141.9 KB Created: 2021-07-04 10:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 74369ce7967aa438bb21eead827da45e SHA-1: fe060855f2659c46f238dcbb7a62346f54f89319 SHA-256: 4a36b0c8d086282ac93189f5f0f87bc14f6873808443dd9772cf085a60217344
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URIs, many of which point to IP addresses or compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 http://157.230.241.115/image/upload/File/15498508800.pdf PDF link annotation
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93efc033c---xetevagixedukinemidu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/b521a9d3d36d427556aee3bf772c6232/13425921014.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/82246460748.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160925f1ad5bff---63204921315.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a4d6b1d98---faxad.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/e34f41fb3e539f8e76d1db3d89d4d2ee/mabajamijimekulixetukibit.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/1934c2a3e17ad72024e3f2c5f0a85716/71527285140.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/varuvafedigaden.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/tejitisem.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608777ab6c24a---35117126323.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/95021875384.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075a91d1bcb9---26596376502.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc37622242---19429031126.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/gasivinulakufik.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/200f7aed2a4f71574db36460ec820dc7/lojugesedusetazibodofiza.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/gumofoxaruxafikatugiboni.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/saxesotevetexumoredo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=red+dead+redemption+2+brother+and+sister+stole+my+moneyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB4A 17444 bytes
SHA-256: ff07a0b40566ebe369808d0747a0652c75e2ffc71495cdb0d82aa028dd07ae1d
font_01_sfnt_off0001f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8A0 11076 bytes
SHA-256: 3a23bb8b19ed8fc69a701a3e9aef62ae09d1e5685204fe7e4393296f483a554a
font_02_sfnt_off00021213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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