Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bb114ec39b01a4…

MALICIOUS

PDF

77.3 KB Created: 2021-09-10 10:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: efbdfacd5b69138088ebad9b5e52abbe SHA-1: 24108f99b71136ae13688c2f503576e631fa2bb4 SHA-256: f7bb114ec39b01a4ea35eee40a8d5dca3767463c3eb0e948be7f0755fd749daa
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many hosted on disposable or compromised domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 https://allytemp.ru/uplcv?utm_term=create+zip+file+in+android PDF link annotation
    • http://taeguektour.com/FileData/ckfinder/files/20210901_119D5AD87F834018.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376ec6a5738---20567174054.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/38266155262.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/73063679491.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/xitefarifefoze.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/pewugup.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/51413993112.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a29e6ccfa7---venevafonedo.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/17353386995.pdfIn PDF document text
    • https://olterus.com/contents/files/kikuxug.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/zarijunubi.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/gelibo.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/vutave.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/baxobidijeku.pdfIn PDF document text
    • http://liyangah.com/Upload/file/45778761718.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/lebuwogozikej.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/fa5f3bb5c59eeb026f16d3cb46d62ab1/97405599515.pdfIn PDF document text
    • https://dukupahit.com/contents/files/tosijajufediboti.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/sebivetatafikaxifapodatam.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613520e9e3ef3---putujukitijekujoxuvazix.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/34688101118.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/67584792421.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/xunujibomixi.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/8466036382.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/keduzoforatidiposudebidox.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_off0000cb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38F 10412 bytes
SHA-256: 8e95e314ddc93844727ec2b673b6ec82a187eabbcc828e31ba3df86cf8afe1e1
font_02_sfnt_off0000fb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 17632 bytes
SHA-256: 000c4f3d9e5d24d95cccd077234c2f899ad500502ded1d926c3857a6af6d2c0c

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