Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce1cffd4eb8008a…

MALICIOUS

PDF

79.0 KB Created: 2021-03-12 06:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8bd4f35f9fc954e05d45875c38ed1ac9 SHA-1: 1bd34f6459094edd440629e7852be3d30cab608e SHA-256: cce1cffd4eb8008a6b90140918f0a992685e11bde4c04de9486b490901ecc0bb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary external URI pointing to 'mezovuduw.ru', suggesting it's part of a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the overall heuristic firings strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=malawi+assemblies+of+god+constitution+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393911/normal_60128108602ae.pdfIn PDF document text
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/5800413.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/jbhdSEG/telegram_web_qr_code.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/pinuwe.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/punujakowaxabimeti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5ff161fc5e739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5fd63643836b5.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/jjcJjcD/xofitiperub.pdfIn PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/betugaperugus.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/kelomig-dijunetogeku.pdfIn PDF document text
    • http://pimadukemaxi.22web.org/favourite_song_cue_card_sample_answer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ravitujupap.epizy.com/93147216108.pdfIn PDF document text
    • http://fusezumapaj.epizy.com/nawavufofad.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/introduction_to_modern_virology_free_download.pdfIn PDF document text
    • http://burisaxaz.rf.gd/24366611789.pdfIn PDF document text
    • http://jegovogetaferop.epizy.com/66380647524.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/kojudakuwejodupunudurixa.pdfIn PDF document text
    • http://vulekagezefodek.rf.gd/2448114983.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/craftsman_20_chainsaw_review.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 5616 bytes
SHA-256: c09c76021f370e6e333e13b0119f6a5f4260d01ec3149b0610d56aedb8cc0eb9
font_01_sfnt_off00010bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAE 10144 bytes
SHA-256: 593f3f40ea9960cdbcbdfe3a7591400c6d8af875f2c95f8c245489568d18c2a9

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