Malicious PDF — malware analysis report

Static analysis result for SHA-256 570c1297810dc516…

MALICIOUS

PDF

90.3 KB Created: 2021-05-26 13:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eacd7e076665b9501fb3712cb256604f SHA-1: 16f4fdd3764d5ba569b246199a83f1f4cec2c140 SHA-256: 570c1297810dc51699a710106bd98ff6e6b2f48ddca78cee94f4d43b75cf39ea
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=quantum+resonance+magnetic+analyzer+installer+free+download PDF link annotation
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/rakobemijudi.pdfIn PDF document text
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/1336327.pdfIn PDF document text
    • https://xewimimami.weebly.com/uploads/1/3/1/8/131857815/97a1ca4ce9.pdfIn PDF document text
    • https://pixofanipadolu.weebly.com/uploads/1/3/5/3/135326367/8bf75630f.pdfIn PDF document text
    • https://vubopedu.weebly.com/uploads/1/3/6/0/136083963/60b19d2f7259fd2.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/4920116.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/sazalem.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/bejexe/lokomevid.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/how_to_make_money_online_selling_leads.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/penipatozo.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/kung_fu_choy_lee_fut_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/binimowasotuvotasabipokad.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/mrs_funnybones_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a14006-60b7-4990-a25b-0984a39e357e/10th_class_physics_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49cb68b-1884-4b2e-b77b-a05a1b9484bb/bose_acoustic_wave_music_system_cd_player_cd_3000_graphite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba539985-c561-406b-ba4b-0fc0086b9871/grade_1_worksheets_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/ap_spanish_literature_multiple_choice_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/busajatezu.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/tigexirajitawafegitaba.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/what_do_you_call_the_owner_of_a_single_member_llc.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/mimujiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/fowosekovatexepaju.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/bandpass_modulation_and_demodulation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be614b09-d6dd-4add-abaf-fc9dbfdc4403/zeminuniraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef45152c-a92d-49b0-8e14-c482ef4080fe/cambridge_primary_progression_test_science_stage_6.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/guvexizexufufegeg.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 5648 bytes
SHA-256: 8046bac718d856168efc18db333b0bde47cd2f6c40a68e5492ffcb93a6fe4481
font_01_sfnt_off00011b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B26 11664 bytes
SHA-256: b3c003945427c907c768537c330c984b8e570d0f70aa8316ddf3c9f7497f91a7
font_02_sfnt_off00014317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14317 16260 bytes
SHA-256: d25a34a56be33791b66bd7dbe91ee772b39b89bee75ba0e64ef3ea6cb2c10b57