Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f7acfefda31167…

MALICIOUS

PDF

71.5 KB Created: 2021-03-30 01:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6c99c5140af67246230a9d94d41c5f96 SHA-1: cfd0ade79a23a5f8b711df37b4744300e651d623 SHA-256: 96f7acfefda31167c84bb9c3441cbffcf214760bf95800a4e9023b7a13eddfe1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, 'https://seumenha.ru/strik?utm_term=algebra+lineal+y+sus+aplicaciones', suggests a lure to a malicious website. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/strik?utm_term=algebra+lineal+y+sus+aplicaciones PDF link annotation
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/9683524.pdfIn PDF document text
    • http://cardioactiveitalia.site/2018_may_calendar_templateeipjy.pdfIn PDF document text
    • https://zomogazafef.weebly.com/uploads/1/3/5/3/135348967/1858985.pdfIn PDF document text
    • http://jobs-ingenieur.best/can_you_take_a_practice_sat_onlinei4h1q.pdfIn PDF document text
    • https://bebabigi.weebly.com/uploads/1/3/5/9/135977904/gedazimezodejig_dizagi_zetaw.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/smart_watch_faces_reddit.pdfIn PDF document text
    • https://verulofu.weebly.com/uploads/1/3/4/0/134012380/1a85622f8e291.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/pixilovifakedu.pdfIn PDF document text
    • http://narosisebono.22web.org/jikosedak.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/pofijamigebeke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/xosaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/zesowazevabetokefazewoda.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/what_is_an_easy_keto_breakfast.pdfIn PDF document text
    • http://zejenideve.rf.gd/the_natural_movie_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/xirawufarikuwewoputuxawu.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/how_rare_is_white_tiger.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/jukojogejuzufer.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/38190013346.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 5332 bytes
SHA-256: b8e463cca92609b765a3fef2d6168dbba3020b8ccef1a8df18d1487c89418a8d
font_01_sfnt_off0000e381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 1600 bytes
SHA-256: b98e107a80f0b4f166d1b3b1798c8b7e967040295853b283bf22dac6d430d62a
font_02_sfnt_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 11396 bytes
SHA-256: 554cb27eb2d72fc9ab73029bae41dbe0a996c9c8376c2809bf60d70ef7aedb2f

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