Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea60c702973aedc4…

MALICIOUS

PDF

130.8 KB Created: 2021-02-06 22:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a59e4f62ad54da4cedc5b121b35da9b8 SHA-1: fa9866db6a06b5234175bb4c0891de534c6ff701 SHA-256: ea60c702973aedc498f22c3456d9ad6eea15823666d2b290ff43965782e61724
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9812

Heuristics 5

  • 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.
  • 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://druttle.ru/123?utm_term=morning+sandhyavandanam+in+tamil+pdf PDF link annotation
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/wiwafizik_zawitofo_nanuluguko_genuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_5fd21974e27c1.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/sinijulozomo_raseva_puwamadisije.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/fobefuniwidav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381289/normal_5fde8bc39bc02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450883/normal_5ff9cf350e4b8.pdfIn PDF document text
    • https://kadekorik.weebly.com/uploads/1/3/1/4/131453454/9962779.pdfIn PDF document text
    • https://lewixukulir.weebly.com/uploads/1/3/1/6/131606807/cc436.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/jebalelegolibuxekaji.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/aJrih0I/wodogebofimagefisereme.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://s3.amazonaws.com/liwara/97456095854.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/12136944810.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/destination_a1_free.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/35404333149.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0001be0f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BE0F 14948 bytes
SHA-256: f2859b8b9769ef9ff481199be46ca0e3744b6fbc80dc1cb5d97cdd0fb640263f
font_00_sfnt_off000153a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A0 5624 bytes
SHA-256: a7094b09a4cb1b074e3fda1910571de90e9e0b75e8e3f78d2ebf589cea9093cc
font_01_sfnt_off000166b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166B0 3180 bytes
SHA-256: 524b43d05730c5f1d5c0ebe0ea950e322c5050cdb2d4313fd7fa557db83c7c62
font_02_sfnt_off00017376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17376 3772 bytes
SHA-256: b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540
font_03_sfnt_off00017f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F10 2692 bytes
SHA-256: 691910899bc3e2a6774b1f7f9b570130b13e17747cb088d1807f414fc6e14638
font_04_sfnt_off000189c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189C0 1944 bytes
SHA-256: 5b736da99b56f2635dc3d14a59a3b862eecfbf6e01f51b66abb9766202043a01
font_05_sfnt_off00019362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19362 14072 bytes
SHA-256: 892e7a2de6b59aff42061066b4af426ac16b76fe884c6069604fdae35e790349
font_07_sfnt_off0001ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC4B 6084 bytes
SHA-256: 0bbd385887db5074fbd87256d70f98a882c9353f1362fd6c1377f0ce146e0394