Malicious PDF — malware analysis report

Static analysis result for SHA-256 11dda4ce364344d9…

MALICIOUS

PDF

112.7 KB Created: 2021-02-19 23:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4489a514bdadcf44775373569bbad213 SHA-1: 2444b1863493df5b0e8a60228a0e1d33afa9cf36 SHA-256: 11dda4ce364344d9c9c62072c471be5767e104c771c723c2833efe3d701612f3
184 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded links, such as 'https://yafferge.ru/strik?utm_term=revelations+of+divine+love+pdf', are designed to lure users to potentially harmful websites. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=revelations+of+divine+love+pdf In PDF document text
    • https://cdn.sqhk.co/pofilese/gih1AE0/rezazufevazejikerakesik.pdfIn PDF document text
    • https://koloxajemixe.weebly.com/uploads/1/3/1/4/131482821/28bf71b24.pdfIn PDF document text
    • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/4930157.pdfIn PDF document text
    • http://sovetnik53.ru/ririkipisijefoyu85o.pdfIn PDF document text
    • http://fenellalucynelle.info/caleffi_manual_air_ventyigu9.pdfIn PDF document text
    • http://rusherx.studio/jezaritezetivovebqtgkk.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/game_crash_bandicoot_ps1_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zoxutudirufusoj.epizy.com/97405357923.pdfIn PDF document text
    • http://jozorawoma.rf.gd/18391861187.pdfIn PDF document text
    • http://bulegenarofil.epizy.com/logirubujovotom.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/spectrum_tv_guide_metv.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/how_to_reset_comcast_remote_to_box.pdfIn PDF document text
    • http://gajazuwowawe.rf.gd/driver_booster_3._2.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/20511867108.pdfIn PDF document text
    • http://kovudefimure.rf.gd/beramagededi.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/15097686688.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000165d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165D6 3036 bytes
SHA-256: 36cce0837ce6afc4033f3f6b443b0d45272a39f6ee4c0579fb4c8b3086f8fd41
font_01_sfnt_off00017088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17088 4792 bytes
SHA-256: 9ba1a2b34c551cd916c62d4e2d88dc4d9b3c4f383a515e57004c38330fc5febb
font_02_sfnt_off000180f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180F1 11200 bytes
SHA-256: 6ca4eb9f4302fb2791f603810075cb092d3975cd518c6873051809a405a82a89
font_03_sfnt_off0001a6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6E1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378