Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5f73d192ee3a83…

MALICIOUS

PDF

84.0 KB Created: 2021-09-04 08:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3fac9d3f7f3182ec50dec051355eed6c SHA-1: d333ec7829e549a83cff4a2479a630a91c6a878a SHA-256: 1c5f73d192ee3a836d8cfce31ed83edebd36e613cf21c2f21278199605ee6c07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely using embedded JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160abd4dba51a3---69560377040.pdf In PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/fawodaka.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0eb711d26---badonotot.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/0f9iqh8vptp6lur6g2tvvm9vau/24448654172.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/83699229561.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/79092586853.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16071e6f4a40f2---94022693300.pdfIn PDF document text
    • https://medtek.vn/storage/file/wegajofiluxebeji.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/zuxakedexaminu.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/97121201081.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/72862598250.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/e1d3j5s0te075snius33k5b2r6/69745777189.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/wijemepitob.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/34586552524.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/cd960da9a0f52e73cbf2afc67ca43a67/rimobaxulapivivomenefirik.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612d87c8ddbb0---lagesalaradadusakenipawus.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/bajoniloxebekilab.pdfIn PDF document text
    • https://moolans.com/uploads/files/lowujaxad.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160875925bc5fa---sakapowakegewigefag.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/wawuwonepoguju.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/qmqfaop563t4lh03nkkaacm3p1/7454792684.pdfIn PDF document text
    • https://labelmarket.pl/data/file/rofopagobefojipagipuguxep.pdfIn PDF document text
    • http://guowangcable.com/d/files/xitiwo.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/k8v7smr9jne2bkft67jdo8e4m7/79743829646.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607077d78d670---13243262560.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=coordinate+geometry+equations+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_off0000de4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4F 19168 bytes
SHA-256: 1b9bec0281812e02b3690f5574a8aa044c1d5336834e14be6b1efc97c642e849
font_01_sfnt_off00011029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12840 11184 bytes
SHA-256: baa8c57b3d8e92f8cddee5f531ba45badb4adca908d01320e6ab0a7f423e95f0

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