Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd35b5d816a0722…

MALICIOUS

PDF

79.6 KB Created: 2021-09-13 00:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 32a695612abe88f1d8056f310b4adc35 SHA-1: bd32a6a4406e6cc534a91653b511fb447442c020 SHA-256: 2fd35b5d816a0722e2d5575acb63f8ebe30a01aac0d8919b309c4608241f6164
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • 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://parklanehotel.asia/userfiles/file/jajopokulavenota.pdf In PDF document text
    • https://romalasergroup.com/userfiles/files/lolumitikazonajazu.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/subatemiwaputorobi.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/537tkberljnbt24r0nk2moc2s8/damemalidate.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/613e5b1a2346e.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/wejutanepubejigederapux.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/31687780631.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b1a3e9242---libudebolo.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/tijilubejuketepuset.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/89011948463.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/demivevovinefido.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/9608127246.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/63763484213.pdfIn PDF document text
    • https://angem.fr/userfiles/file/repafijikesonovemolo.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/42824797957.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/65823132400.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/dudunizobireruliduxixegi.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/49148300496.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210912234636.pdfIn PDF document text
    • https://x-software.cz/data/file/95579705784.pdfIn PDF document text
    • https://esvigo.com/upload/files/39112234003.pdfIn PDF document text
    • https://mimpishio.com/contents/files/defevibijidadi.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/gefadaxanimikobasubegizen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=android+development+company+in+indorePDF link annotation
    • https://mediaget.com/userfiles/files/54992057985.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://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_off0000d376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD376 17484 bytes
SHA-256: c3a9f0c9efdd5db489beac5e696b83e441b2aab663b38c9e841b01b4d53af790
font_01_sfnt_off00010085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 10668 bytes
SHA-256: 8d36d78bd198cccaa71fb1e2b8982a3844c0e2d23d2f28847ebc00dc40f4878d