Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e835c2e7d63917…

MALICIOUS

PDF

74.7 KB Created: 2021-03-27 14:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daddfd4036d9f982395f60f8b2b19c36 SHA-1: fafb8747cb95d3d84458e2b5c90753bd257220c0 SHA-256: 06e835c2e7d63917807cc7df2ac7906ed54472b530c8b711942a8ada73a5746f
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on link farms or dynamic domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=python+for+data+science+pdf+o+reilly
    • https://cdn.sqhk.co/vasozaponem/bdJZChb/domipabipinejilo.pdf
    • http://gesoxusem.iblogger.org/38321007698.pdf
    • https://cdn.sqhk.co/loxowopiv/gcXHd91/79953858211.pdf
    • https://cdn.sqhk.co/patizuruf/fdZCRVc/dj_khaled_sample_pack_download.pdf
    • http://rasazajafatirek.mypressonline.com/pdf_bacterias_y_virus.pdf
    • https://cdn.sqhk.co/ruxukulalodi/ifpAwRD/rukerixigomafixanumapizuz.pdf
    • http://rujitexoxobag.mypressonline.com/gogujomazen.pdf
    • https://cdn-cms.f-static.net/uploads/4404503/normal_6033927f35274.pdf
    • http://ragadugizidej.22web.org/64867755032.pdf
    • https://static.s123-cdn-static.com/uploads/4366000/normal_60038f339db46.pdf
    • http://tafuxasomup.getenjoyment.net/pafijinab.pdf
    • https://cdn-cms.f-static.net/uploads/4455684/normal_604aa2ae971ef.pdf
    • https://cdn.sqhk.co/rokajoten/ieg2pia/syfy_shows_on_netflix_2018.pdf
    • https://cdn.sqhk.co/sevafeluba/wjgjhhk/lunuzisidubefivurakulupov.pdf
    • http://zuduwamani.mypressonline.com/advocare_24_day_challenge.pdf
    • https://cdn.sqhk.co/serodozire/mdshjeJ/6967189219.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_41eb4f7ff8e94547a6080ef9bfc7358e.pdf?index=true
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_a23b04242584469e885320c47519b25e.pdf?index=true
    • http://selafaveso.rf.gd/what_does_day_trading_buying_power_mean.pdf
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_8d1a987020b54f84a89fb3753206dfca.pdf?index=true
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_fe8d1b62097f4f81a155ec5222d62e96.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea56.bin
7d6366a476b5abfcd0409aaa248ef1dba9386b96c3625a1ac77c9ec42b6d6f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA56 5348 bytes
font_01_sfnt_off0000fc8a.bin
9f12709290d42ae7620d2266db3f5001c426f07c96bec6f54e9febb8bb285e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8A 10956 bytes

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