Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad70015a4a2a5128…

MALICIOUS

PDF

89.7 KB Created: 2021-06-29 16:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0f516b47d35c9463ae6e2f4494081564 SHA-1: 209c09ad75a778f13a2856d41cb1eafdf6a15a10 SHA-256: ad70015a4a2a51280b39ae5dcb083311b8eefc92174e94e5e4c7d3b0c1f7719f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, hosting numerous PDF files on compromised WordPress sites. While no scripts were directly extracted, the nature of the link farm suggests a phishing or malware distribution vector, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4256457015---37258685436.pdf In PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/vsftqrsrn66t1tv3bnkj8pd1v4/wesuzulosegeravugowagaxe.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/wuxorejigupatexuvaxujuru.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/daa50bc76419504e0d9d980f538b187f/vudefekalenitonowumeput.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/9a69b89f8f61cf6b5ee0d5bcf872a2d4/14168707394.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1624662745.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da520675f5---romefeziwexavuja.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/rulerusijaxosavor.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/fosewujuwasapoxiz.pdfIn PDF document text
    • http://synowka.pl/galeria/file/wadifimiwimineb.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3bd022a02---fupadosojubofoxigawov.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b71c6ab1de---62781554179.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/xixaxexoxaxoxapofij.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086ce2674f4a---sutajilojulog.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/41eaaad264dfda9266a4ea309110c94d/38391152612.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608213314b6aa---91178472779.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/3ur9arcqnb4l5od1ug8d81u06n/pezenukeginifisove.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/wevegetopagiwavulujisapa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fg2ucavhut1rs97a4b05v83306/tedilofekifovum.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d91660405---lukozegajuxonale.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210522031049853977919.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7e69b2c9---50935091144.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/fc3c802f563809fa12aeac34ab6844bc/xapadex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+get+hot+metal+dragon+in+dragon+cityPDF 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_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 10840 bytes
SHA-256: d392c1d49c572a7cddf127a29f67eab920a601fd1594b9d3963396eda41f8cb8
font_02_sfnt_off00012cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF8 16976 bytes
SHA-256: 9b913a1a1572f6f7965504bd2ed0ddc4dea7fc2e1c1fc473060da32d11a85702

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