Malicious PDF — malware analysis report

Static analysis result for SHA-256 222fbb67d820d5a1…

MALICIOUS

PDF

97.2 KB Created: 2021-02-17 19:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 04706085b9782ba915d561a4f85b5a91 SHA-1: 2532b2b7e4c317582c0f128dbcd4a6e152437829 SHA-256: 222fbb67d820d5a141542ddaa7b0c82c57900af7679091b463c9d720a3987697
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs that point to known malicious redirectors and link farms hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=descargar+musica+de+anthony+santos+popurri+en+vivo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446158/normal_5fdb71d165eeb.pdfIn PDF document text
    • http://sowaviwexurejo.22web.org/noun_verb_adjective_list_bac.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/ghGhbgh/70894968016.pdfIn PDF document text
    • http://healthit.space/oc_character_sheet_commissione5x83.pdfIn PDF document text
    • http://esplus.pro/sample_of_blotter_report_tagaloggtk2h.pdfIn PDF document text
    • https://cdn.sqhk.co/zidomirit/8gjLhiN/lesozipajikuvunonixolexam.pdfIn PDF document text
    • http://instapodarok365.site/51825439537iua77.pdfIn PDF document text
    • http://filmera.ru/xabetuwerigefeginijaloraa5mle.pdfIn PDF document text
    • http://edevletorg.com/mikuni_bst34_carb_manual89408.pdfIn PDF document text
    • http://craftsmansmetics.com/tevusexeribelevuzimorqavvk.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/Fhcj8nD/goguxisepisusemufes.pdfIn PDF document text
    • http://sellforce.ru/logo_motion_after_effect_templateagh0w.pdfIn PDF document text
    • https://cdn.sqhk.co/forexajepusa/gegdcig/foxuval.pdfIn PDF document text
    • http://myfirstsite.xyz/2007_suzuki_boulevard_c50_service_manualo41b1.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefekug.rf.gd/bootstrap_admin_template_php.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/warsaw_pact_treaty.pdfIn PDF document text
    • http://lubozogemodusa.epizy.com/37630484069.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00011250.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11250 13612 bytes
SHA-256: 2e445f7dabe96748982c00b158575e5268506b28b40a0989ab8a9121ee606f0c
font_00_sfnt_off0000d4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F0 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 5616 bytes
SHA-256: 7487f4f9fec6553c17c50294fcde9266f95c323934712ed0992137b656e27049
font_02_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 8112 bytes
SHA-256: 020f22a69d8c9b4e27adb7675bc7551d8a95fedf08d8ecc3b1a308ce3ebd14f9
font_04_sfnt_off000138cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CB 10772 bytes
SHA-256: 493ce4624f5406b434a457161694e858796edf44605e8a46eb17db5e7593bee1
font_05_sfnt_off00015e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E18 17004 bytes
SHA-256: 362086a8f56becab1e2b8f44868f1ace5d1236085d6934dd516d9ad08fd09d1b