Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d45f1b9b5ff8f1d…

MALICIOUS

PDF

150.3 KB Created: 2021-02-04 06:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 77095d5aa9968e95b1885ae646f7d26e SHA-1: ea12abe4d721432d660355e7ca9a6ec074ab560c SHA-256: 4d45f1b9b5ff8f1d9b4ebba761279b14f9fc248fece169beb0183effdd02779d
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'login form template react', likely intended to trick users into visiting malicious sites for credential harvesting or further exploitation. The presence of multiple disposable hosting links further supports a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://yafferge.ru/aws?utm_term=login+form+template+react In PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5ff7a53b857a8.pdfIn PDF document text
    • https://debesawoxud.weebly.com/uploads/1/3/0/7/130775383/baefa31cc66c1.pdfIn PDF document text
    • https://cdn.sqhk.co/guludagew/nidiXoP/jawuv.pdfIn PDF document text
    • https://xosaxunifepin.weebly.com/uploads/1/3/0/7/130739048/00cb58f8d.pdfIn PDF document text
    • http://instas.site/253241266612wsbi.pdfIn PDF document text
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/fa4253.pdfIn PDF document text
    • http://lestyprin.online/89798708982nfc0x.pdfIn PDF document text
    • http://stakingyfi.com/41533673457ztx44.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/JoaWSha/league_of_berserk_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/ihUhdWk/megan_is_missing_true_story_news.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/iggidkJ/electrical_apprenticeship_jobs_in_oregon.pdfIn PDF document text
    • https://mipijanifubu.weebly.com/uploads/1/3/0/7/130739658/seladusaj_bonuvemiba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5ff2be630c3e7.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/e9oijCv/kilavolinulimufotolomuki.pdfIn PDF document text
    • https://cdn.sqhk.co/sofuxizago/hdhcTXh/carrom_board_business_game_rules_tamil.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/sozosunejagaxilu.pdfIn PDF document text
    • http://termometr-medikal.site/goxusabefibepelaisdf.pdfIn PDF document text
    • https://nuzewotamomumaf.weebly.com/uploads/1/3/4/7/134701518/472c8f21852.pdfIn PDF document text
    • https://cdn.sqhk.co/wediximewoza/SJ5QPgg/10079750067.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/JhikidO/mogekavatusiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF2B 6812 bytes
SHA-256: 705a40f2f1299da93398ac562f39fb8e280a7b0d058145836d6dafd55d8ad212
font_01_sfnt_off0001f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F05E 5100 bytes
SHA-256: 2bb4c393851b0a1e1a7b2021abbc71407f48ceaa2a0348348133c3db0eb784bb
font_02_sfnt_off000201a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201A2 1980 bytes
SHA-256: 4b509282131fd9e4a1469306b28cb49a923f3200c231789adb598c433e112531
font_03_sfnt_off00020a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A7A 12400 bytes
SHA-256: d8e880c5be1d58d151a2c50f926bfcffd35d664a19a202ab258fcd01fd84d389
font_04_sfnt_off000234f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x234F7 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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