Malicious PDF — malware analysis report

Static analysis result for SHA-256 05aab4323ca44e7b…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 02:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 86632dbab4a5b3ee7ed3ec8475a2cbb2 SHA-1: b267a0d22659aef5e1d4e8f14528e97962d99ce2 SHA-256: 05aab4323ca44e7b5b0d1aed67588447e90a4a977d372aac5b3b3be75b95f629
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. No scripts were extracted, but the primary attack vector appears to be directing users to external, potentially compromised, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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://summitremodelinginc.com/userfiles/files/20322198989.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d161ec727f---77891618370.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/xaporuganifuresutivil.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/82837069669.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b489be8dbbb---nixalekibixizavixif.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/l52b0qcp7ip9aout7mh18vtdqb/jobozibuwaronobuxagevuki.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/22460685624.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/f0b0b8d8ea8be8946b7c11745e5ab2c8/58816210752.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/8464861624.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/44209847086.pdfIn PDF document text
    • http://ashioke.com/images/library/File/virazobilepolosetu.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/cd6a9be43620de3e3ace8d0a62bbf001/wizikoletepakofibetuja.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021829724262293.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/150901237560aca22c8b2af.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/mm4he3k7oc38jvejgs9v24obu4/4646352022.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a159a4ee90---jifafafijokomemo.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/pesuxosafezepurutogaluk.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/97163056427.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/nixigimejegutefegebo.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/vefetomofi.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/80748534889.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/33775417011.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e18b2749c---38980233132.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/nusedetekowisebefas.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161305f30b4255---60946855175.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210619001336_8883925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=effects+of+depletion+of+natural+resources+pdfPDF 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_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 10696 bytes
SHA-256: 50a99be08ab6cf00d0c318282396d8ffcf637f52f9fa7c82a8b8ac1fc2f053ee
font_02_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 18328 bytes
SHA-256: e6552e1564fd931dbc9771ee100e7c4506647a2e71bc78f030339c617ffda0cc

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