Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e6ae9eb4590fe3…

MALICIOUS

PDF

84.6 KB Created: 2021-03-25 16:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4708c204f2b27151e9ba496e610a7683 SHA-1: 23627049b3301bb581513c41f103b7ee7e6ae235 SHA-256: 80e6ae9eb4590fe31571eeebe6aa0f139f4f4b8a1a71ca270f4506deec5b033f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of links, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/wix?keyword=maytag+quiet+series+300+dishwasher+manual+pdf
    • http://dfwshootersupply.com/73373976792k6lb9.pdf
    • https://raxuzorozejataw.weebly.com/uploads/1/3/4/0/134042373/ad75069bcf98.pdf
    • http://itdiscounts.info/problemas_porcentajes_encadenados_4o_esobwask.pdf
    • http://xviiivbgz.com/sisevoguxapefozulitajizakhx736.pdf
    • https://cdn-cms.f-static.net/uploads/4421641/normal_602a1d2be1a75.pdf
    • https://static.s123-cdn-static.com/uploads/4472764/normal_5ff2cbcd4f8ca.pdf
    • https://cdn-cms.f-static.net/uploads/4380705/normal_600aa3556df5d.pdf
    • https://cdn-cms.f-static.net/uploads/4489240/normal_6047ee403e035.pdf
    • http://meine-gebuhrenfrei.com/bipizenakalirevowotezuzoo4r4c.pdf
    • https://cdn-cms.f-static.net/uploads/4451375/normal_603167ca15b62.pdf
    • http://dipufuvolog.iblogger.org/gorozuvoku.pdf
    • https://tureduritisamo.weebly.com/uploads/1/3/4/6/134676104/givixaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zasepo/17874871760.pdf
    • https://s3.amazonaws.com/banula/elsevier_research_article_template.pdf
    • https://s3.amazonaws.com/tawosutosuxi/82864438633.pdf
    • https://s3.amazonaws.com/zinudipir/66328568167.pdf
    • https://s3.amazonaws.com/minabiwa/20825878456.pdf
    • http://kifemulawej.epizy.com/how_to_draw_a_face_for_beginners_boy_easy.pdf
    • http://rewifavad.epizy.com/doxutiju.pdf
    • https://s3.amazonaws.com/fajeloninesitel/58638786180.pdf
    • http://pojasiw.rf.gd/52300584689.pdf
    • https://s3.amazonaws.com/somamere/wivakaragunibibovegifez.pdf
    • http://bogigipoja.epizy.com/6798135269.pdf
    • 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_off00010906.bin
354226953562c2800d81dfbd85179eb6b6f1447f7d452452d773e1d6bc57f17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10906 6084 bytes
font_01_sfnt_off00011db2.bin
bff768d51affa487292bebb733efaad608d4b9f47838558378153164403a5b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 11476 bytes

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