Malicious PDF — malware analysis report

Static analysis result for SHA-256 001c7b3e6d190a33…

MALICIOUS

PDF

68.3 KB Created: 2021-03-27 17:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00da3bd6965fcbe00ae45f76f21919d2 SHA-1: f20aa54c8e06135c82c02ba2adcff434363a054e SHA-256: 001c7b3e6d190a333ff09756dedff73073a1205eae7ec58e893e0ec0af14e168
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a link farm and another flagging a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to lure users to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=engineering+physics+avadhanulu+pdf In PDF document text
    • https://vopobibipudo.weebly.com/uploads/1/3/4/6/134620476/vakevovafigaxatep.pdfIn PDF document text
    • http://slmit.fun/32123924033svt0l.pdfIn PDF document text
    • http://igbusinessabouthelp.com/junugiwott7gqo.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/lipitoturo.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/gosiwusazuk.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/60799.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/lirafet.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/82795869026.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/how_to_put_soap_in_a_soap_dispenser.pdfIn PDF document text
    • https://sukorason.weebly.com/uploads/1/3/4/5/134578332/661604.pdfIn PDF document text
    • https://vewagabijepafin.weebly.com/uploads/1/3/5/3/135348553/a2ef1f18d692.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/vasofirida/hollywood_hd_movies_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/crude_oil_report_live.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/beauty_and_the_beast_cartoon_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/95261701470.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/todagotizotav.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/ditisanu.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/how_to_program_xfinity_remote_to_sanyo_tv.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/lunekawisofuxixamaxafari.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/74702740077.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_off0000c73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73B 5536 bytes
SHA-256: bc7430d6591c9db12a46f3870a58f00db7569fc14454206dbe56683ea50a00e1
font_01_sfnt_off0000da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA28 10084 bytes
SHA-256: a47536d430cda5be48702d516acfba9fb87047dad62a5b83dbbc7c70166de778
font_02_sfnt_off0000fc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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