Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5354fb4060a5b1…

MALICIOUS

PDF

81.0 KB Created: 2021-09-02 08:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 21790b5163dfa5be4144ad1fee85c215 SHA-1: 602735d4c05d8079b2fd4e725dea8c2034d9cacc SHA-256: 1a5354fb4060a5b1c0338262404d22f2fc78b61b1fcdcbe56de0016fb7e54815
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to lure users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 https://queure.ru/uplcv?utm_term=red+wine+gravy+without+meat+juices PDF link annotation
    • http://abovomedia.hu/_user/file/pavanufedidoz.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/ac31d5f88f3ce2430efb222b948ab493/93810254261.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845f7e78d27---vates.pdfIn PDF document text
    • http://emannsltd.com/userfiles/31539764195.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/032d3ad0a7eec39b633b2339445fc449/55837273066.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/56383779937.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210831042311.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/53400186940.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/uj3a59mcue2a2bod1es9gluebm/16018304893.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/11871372451.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/40d410ac1f83a590fad5f2c3636bbca5/92597510874.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/kebafizijeradidexugemipez.pdfIn PDF document text
    • http://babamoleskine.com/files/file/jexarunedopot.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/14134790017.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/firedifugokumofanuxowafu.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/d9b6df9443088ba1a71c616637293c3f/1416156160.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/40954665883.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/xewexibiferi.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/vexoxarijititonuwiwiguwid.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/d4f9361281902d97f3a8487828fd813b/bebedokinirufupif.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/95131070811.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/14698013546.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1f60ba113a14cbed11c4c26e525bffb8/disabizopovemuvajixa.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_off0000d4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 11312 bytes
SHA-256: f76bee8e6d3094c44b62cc2a5614580ab09d5106c20b00e505f7a89aad49026c
font_02_sfnt_off00010724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10724 17824 bytes
SHA-256: cc3a5390f4c28df27e6bae41aeb9dfd92d030559357dc5c72336c92953df0558

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