Malicious PDF — malware analysis report

Static analysis result for SHA-256 002a12911357f748…

MALICIOUS

PDF

72.7 KB Created: 2021-10-01 00:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d599bd534101113413d6ef530a7de962 SHA-1: 90d2173178b54bf4ad4a26e51c819a1dfeb9d040 SHA-256: 002a12911357f7482dc282a4648fa82b6fbb036f430e11deb94306260af14c10
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised WordPress upload storage and disposable hosting, suggesting it's part of a link farm. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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
  • 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.
  • 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) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tiszaladany.hu/upload/file/82042893675.pdf
    • https://tskrea.com/userfiles/file/rafusukekubexikugimewesi.pdf
    • https://ptogel1.com/contents/files/48582136384.pdf
    • https://excellencetogether.com/img/files/file/lazomosukesoxugexonifip.pdf
    • http://hainfelderteich.at/gonakigaxebabibunove.pdf
    • https://noelex22.org/userfiles/file/79070452609.pdf
    • http://maezawa-jidousha.com/js/upload/files/zevakajorusiveper.pdf
    • https://naveenent.com/administrator/imagetemp/file/gozenidagavafuse.pdf
    • http://nanoservice.cz/upload/file/biwojisarekateso.pdf
    • http://cancunday.com/travela/img/files/kodorozamigerubemefilof.pdf
    • https://kstraders.com/userfiles/file/wusonamibeba.pdf
    • https://pergamine.com/ckfinder/userfiles/files/babefivej.pdf
    • https://grandplaza.bg/uploads/assets/file/71227621517.pdf
    • http://s-pack.kr/userfiles/file/20210912114517.pdf
    • http://cungcapluonech.com/upload/files/64815935525.pdf
    • https://jf-orvalho.pt/userfiles/file/joxuvigekojo.pdf
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/zoramuvodidupijejapejelos.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/00303c153c9412d4a6395307a0052af7/mowubopuxamivup.pdf
    • https://pecsikult.hu/files/file/13274335011.pdf
    • https://zhansq.cn/upload/file/9983684509.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c061e2e1e8---88656789233.pdf
    • http://factorycontrolprojects.com/userfiles/file/33360317449.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156305da0a47---foxasani.pdf
    • http://barcabianca.eu/upload/file/litomozuzalofi.pdf
    • http://goldenteriyaki.com/uploads/files/jemonumasuv.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a7d29a6d7---3969148551.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=halo+for+android+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6eb.bin
5b9eddc328b7af94257cf95a4816f215e86341414d5a7b8d9ef3b7df187fd144
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EB 10176 bytes
font_01_sfnt_off0000cda2.bin
dbb7c72874d90c2985a1058d1fd77079b551467a911df8563f185924102b3104
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA2 18676 bytes
font_02_sfnt_off0000fd3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3D 16792 bytes