Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fcc83bd907cff7…

MALICIOUS

PDF

74.5 KB Created: 2021-03-18 01:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 15026f26bf760d19166f03ab782e48a1 SHA-1: e6ac9d351e7f9e70692324eef527e477d765eee6 SHA-256: 22fcc83bd907cff75627e082f2b5ddf2e11e1101049d84e03db86952708f9c43
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains embedded JavaScript and a mass of external links, including one to 'jottigo.ru', suggesting it's designed to redirect users to malicious sites. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of links, likely for SEO manipulation or to host phishing/malware content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jottigo.ru/strik?utm_term=fios+quantum+gateway+router+bridge+mode PDF link annotation
    • https://fudesatalaponu.weebly.com/uploads/1/3/2/7/132710537/5725803.pdfIn PDF document text
    • http://gigojosok.22web.org/dubemidaterovow.pdfIn PDF document text
    • http://titofiz.22web.org/asphalt_8_airborne_cheat_engine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497131/normal_5fedf0d84aa6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_600a1ef6ac2ad.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/4745836.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/1868491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6050d733b6061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_604cd0e84fbfc.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/fejakixoweka/jisamurelosasuravuko.pdfIn PDF document text
    • http://jojudodadanu.epizy.com/zilerodarixumokugi.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/wedding_march_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/tedonimewakuz.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/python_data_science_essentials_review.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/sozifuxol.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/50904496603.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/clash_of_clans_hack_2018_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/ferawapof.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/89489555439.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/52343793746.pdfIn PDF document text
    • http://tovezujatim.rf.gd/75876776549.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_off0000e4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CE 5528 bytes
SHA-256: f54b5bff36cdab6999c768ef094ceef9de5ec6310a81122f778ee0e4d84760a6
font_01_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 10732 bytes
SHA-256: 2a1038bd9088c698aaa1242a7b8311daff78bcb8af23aca50abaed73fc6cac7e

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