Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e199df830837e75…

MALICIOUS

PDF

95.7 KB Created: 2021-09-17 21:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2621ddb8b6421df9946264fb79ad4ed4 SHA-1: afd88d93ea64e377626447c1a7590e7d6de68481 SHA-256: 1e199df830837e75705018914dcfb1da2a515ead4f0ede426f4edca61cd1d1ba
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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 http://sinorarechem.com/upload/files/dujekilovobejo.pdf In PDF document text
    • https://arendic.cl/files/wopizib.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/veposojivipemanapepamixud.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/gagupeselifeguvilow.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/k316nmrf420j7g1vqh5n2stauc/27367715258.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/74683921065.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/07/jusujixifabebugetopo.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/dafilusesagefibawijirowux.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/66652874305.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/58272317159.pdfIn PDF document text
    • https://quangcaomattroi.com/uploads/news_file/vitoxotarosuzube.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/37680487875.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///nigotizosilopufatipodafo.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/burisisiviburojodewod.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613133fadf964---15438379440.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/gewutuwutunelidezina.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/lozemegugexezerurakerameg.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/jitorex.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/73239787059.pdfIn PDF document text
    • https://riwg.in/userfiles/file/94241300794.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/lererek.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/v9767i3dfujbcq46stskn80413/wemej.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f92bbd5256---pugurebugumuvirer.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/9012329388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=android+city+simPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B2 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000ecaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAA 24236 bytes
SHA-256: d427b416eeb85a2c7cfee4126b0302fa1110e9b26686ae029948d73468f7d499
font_02_sfnt_off000129b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B9 10284 bytes
SHA-256: 83f1dc696559031c28183fb75ff942274f9b9f88a2e6a835d5db8c37e6aee66c
font_03_sfnt_off000140d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D9 16652 bytes
SHA-256: 83d44735c88835e1f792e79134a72ac5308b498df5ba17f81f86d6b904928f69
font_04_sfnt_off00015881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15881 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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