Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a49e1c02255315f…

MALICIOUS

PDF

87.5 KB Created: 2021-05-18 01:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 880556a42a591763a81134141f9db734 SHA-1: 1f392a5ecfb20f5c0fa09f8c9b5c3f48f3d1821b SHA-256: 0a49e1c02255315f81e481a42dd4b98fa320dd8345d4a300cc1f1ad65d9c02cd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains numerous external links, many of which are part of a link farm designed to improve search engine rankings, suggesting a deceptive purpose. The presence of a critical ClamAV detection and a high ML classifier score indicate malicious intent. The document body, though partially corrupted, contains keywords related to software downloads, and the heuristic 'SE_SECURITY_BYPASS' explicitly mentions instructions to disable security software, reinforcing the phishing and potential malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://baarspo.ru/strik?utm_term=epson+l210+resetter+adjustment+program+free+download+zip+file PDF link annotation
    • http://ropajogojijegaf.22web.org/libro_macchi_materiales_dentales.pdfIn PDF document text
    • https://pimedoxeniku.weebly.com/uploads/1/3/4/6/134640330/8983782.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/fuwal_mujag_suwajejibiva.pdfIn PDF document text
    • https://mamonaxerif.weebly.com/uploads/1/3/5/3/135347384/5019906.pdfIn PDF document text
    • http://mesubogit.22web.org/the_scarlet_letter_oxford_bookworms.pdfIn PDF document text
    • https://gudatopizesibi.weebly.com/uploads/1/3/4/4/134472507/jijigabozupitu.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/nuxomigo/oral_b_replacement_heads_cross_action.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/96716791264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a22f2a9-83a7-4eee-8b9e-f5e7a769fe73/49932378710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb0b788-7ee0-413a-bef6-7d99234391d9/ginsberg_howl_poem_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/vietnam_miss_universe_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12446cf-6b8f-4db3-bc82-d47407ba70f8/4242105647.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/bafg_antrag_niedersachsen.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/jspdf_autotable_header_border.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/dd_character_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/85082652570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4755c180-025c-4bad-90ce-452778f40bb3/98880954713.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/bs_player_pro_free_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/907ea79e-ee8a-42a9-b2bc-051c2087fcec/lajus.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/duravit_annual_report.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
    • 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 5860 bytes
SHA-256: 80bab14924483941bcf9380166f46f6b178cc1f515a8e95790499c38123586b5
font_02_sfnt_off0001132f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 12204 bytes
SHA-256: a4a8ab06e8d2d485833634d9b2113af933143288ef89dcd040c4e4b144ba3ee0
font_03_sfnt_off00013a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A80 16120 bytes
SHA-256: 792b17e2d8b7926bbf982488bb4a17e77740ea3a38fff94c5bbd2958d4a1dfd7