Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2c9841361c3270…

MALICIOUS

PDF

80.6 KB Created: 2021-05-16 03:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 22fecf9fc56ad78ec2c94426f8e72a92 SHA-1: 6188844538125cd4327788380bfbf750be75891d SHA-256: fe2c9841361c327073669dec2d75d037532d3965847d4c341b79ed7e8672d885
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to internet connectivity issues, likely a lure to disguise the malicious links. The presence of a malicious redirector and a high ML classifier score strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/strik?utm_term=why+does+my+hotspot+say+connected+no+internet In PDF document text
    • http://fapisobol.iblogger.org/35045786209.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/58204211586.pdfIn PDF document text
    • https://jevizaja.weebly.com/uploads/1/3/4/8/134869407/953826.pdfIn PDF document text
    • https://bexunofa.weebly.com/uploads/1/3/4/7/134721512/994828.pdfIn PDF document text
    • https://zubikuzo.weebly.com/uploads/1/3/1/4/131453486/8933693.pdfIn PDF document text
    • https://vinawulisakuj.weebly.com/uploads/1/3/2/7/132712505/699753.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/jinirexop.pdfIn PDF document text
    • https://gozanesudobewer.weebly.com/uploads/1/3/4/8/134852120/joxasera-jeveziba.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/9230299.pdfIn PDF document text
    • http://budonap.iblogger.org/kirolanuwukamenot.pdfIn PDF document text
    • https://gidupewurugi.weebly.com/uploads/1/3/1/6/131637306/tisebobapefupigobevu.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/potamotaz/a_whirlwind_tour_of_python.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/what_star_is_appearing_on_december_21st.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_622c82116ec3408fb948a7752893a25d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/gre_math_practice_with_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f4cb1e-32d7-4919-a5b5-2a1952f2cd2e/rebajasupiwadepuw.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/46840737122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6c7787-d2d5-4a70-a6ac-7a53db1891d2/how_to_play_makossa_on_bass_guitar.pdfIn PDF document text
    • http://kepiguxolirifod.rf.gd/reaccion_acneiforme_tratamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0150714b-d831-462c-b2c5-5f918b790c97/kings_rising_free_online.pdfIn PDF document text
    • http://namerunu.rf.gd/48365017742.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_a7a9cf65d0ad466cbd84bca3d660575a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizufapu/sparknotes_huckleberry_finn_chapter_17-20.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_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 5396 bytes
SHA-256: 2c616f5a9509a89b30bb6d2df2df1010c42b5448f98d01c633d82d5fcb7db76c
font_01_sfnt_off00010df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF1 11224 bytes
SHA-256: 85544f061644c5051df5ad8c8567410e85473055a8387719c01f39689f855eb3

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