Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2adee9151477a02…

MALICIOUS

PDF

81.6 KB Created: 2021-09-24 09:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 11005a7d9bbbd050c3f3e31d11977fff SHA-1: 3f80175100d68cf94d8f61162b407dacd834694f SHA-256: a2adee9151477a02f283dbf97720406b3337571fe1201feceb0ca63a10315722
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate attempt to obscure the final malicious destination. While no scripts were explicitly extracted, the nature of the links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://crysiq.ru/uplcv?utm_term=movie+buddy+apk PDF link annotation
    • http://canvangdientu.com/images/file/sokikutokigu.pdfIn PDF document text
    • https://twinscooking.nl/twins/userfiles/file/51742368108.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/botepajalakuvosidirupikik.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/nupixipivoka.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/14476143742.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/d762c1ecb58ea3f78eff31192ebeac2a/tubexub.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210921204851.pdfIn PDF document text
    • http://djapm.com/userfiles/file/tuxuxijonitumobapoxekis.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/wubowudozojojivo.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613e14bbd68df---42446138032.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/xuwazenutarerog.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/6787bff75540105f7b81bf02f58c4792/874260096.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/91824027398.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/78957588228.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/84913916604.pdfIn PDF document text
    • http://carraracucinecomponibilitrapani.it/userfiles/files/timudixipexel.pdfIn PDF document text
    • https://gadapavimenti.com/GadaFiles/file/64014686033.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/15479316596.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210905202151.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/85776689450.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/10821851366.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/45087506731.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161496d8256db8---komedenurorotufaniv.pdfIn PDF document text
    • http://markaz-e-durood.com/EditorImages/file/pimuxiruju.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/xodoteg.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_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 17848 bytes
SHA-256: fd2752e721b5c8dc33303bf7680330ccdff75141149e44e407b55ee6db810da8
font_01_sfnt_off00010932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 10376 bytes
SHA-256: 197093a282098524dffa232070276bda767b943bc231369603029b49bf3a9082
font_02_sfnt_off00012095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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