Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ba284a568837d5…

MALICIOUS

PDF

75.8 KB Created: 2021-03-27 14:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3a93626e1dcbf0e5872f4ac4ab92402 SHA-1: 7f148c7e56ad6f840f8f6832eced78c66af36d71 SHA-256: 48ba284a568837d5332342c322059dff5b3d07df2adc37377cbf173dc60b1313
156 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. The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or a method to distribute further malicious content. The embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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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