Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27eddca2fd78323…

MALICIOUS

PDF

309.9 KB Created: 2021-03-24 05:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed173441c8ffafdce1b7e35e953ecdf9 SHA-1: 7cfa328db3fbdd5ba6fe586d2076157f33deed9b SHA-256: c27eddca2fd783234a4f61bfacd77f15800cde67a2cc1691766c009f95d821f8
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating an advance-fee scam lure. The document body, though heavily obfuscated, contains references to a 'grammar book' and a URL, suggesting a phishing or social engineering attempt to trick the user into downloading a payload. The primary IOC is the external URI pointing to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/strik?utm_term=english+grammar+book+class+6+pdf+download
    • https://sakobapo.weebly.com/uploads/1/3/3/9/133999770/tomuxixugoj.pdf
    • http://lozepamubi.iblogger.org/xomovigewesetitoverod.pdf
    • http://a-trvl.ru/killing_floor_2_character_classes6v0f7.pdf
    • http://lg-copyrightforms.com/non_ferrous_alloys_download9v7jg.pdf
    • https://vunadonugo.weebly.com/uploads/1/3/1/0/131070983/5793277.pdf
    • https://powotatetodo.weebly.com/uploads/1/3/0/7/130738650/wikemo-xetawodulesox.pdf
    • https://cdn.sqhk.co/donoluri/jhjiA68/bard_of_blood_book_free.pdf
    • http://idealica-italiaofficial.site/spooky2_frequency_listdc6xb.pdf
    • https://cdn.sqhk.co/gutuxegiwad/dSjjhg2/hazardous_waste_management_ppt.pdf
    • https://cdn.sqhk.co/torazanopuni/c5HbeyP/fokovop.pdf
    • https://cdn.sqhk.co/tononapiwaso/4jekLja/33513919750.pdf
    • http://fonevanezonufo.iblogger.org/etologia_y_bienestar_animal.pdf
    • https://pufegigan.weebly.com/uploads/1/3/1/0/131070168/fivewiwogofi_dofojusorike.pdf
    • http://takipleskazan.org/namijufikevonad1myc1.pdf
    • https://cdn.sqhk.co/jedelamodafa/miaqLkJ/16286273721.pdf
    • http://itdiscount.info/95725553976emvmt.pdf
    • https://xunujilitaga.weebly.com/uploads/1/3/5/3/135315779/7116698.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fotobonifugore.epizy.com/how_to_override_printer_ink_levels_canon.pdf
    • http://memaded.epizy.com/dunozidotazuzajurepawede.pdf
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_b32a7ff4a23543b8a75094ee0c4b2706.pdf?index=true
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_a2052b0829ce4b6b86ff782515a1ab51.pdf?index=true
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_de7c504dd09a4da6bb91183a0f5b3cfd.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004449b.bin
c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4449B 6588 bytes
font_01_sfnt_off000454e4.bin
ca98b4e04a5ba97dd8c24a31536d099a427faffc9fb1028a6961ee56bdd6b501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x454E4 3376 bytes
font_02_sfnt_off000460cb.bin
bbf081b761266f828ebeda2ce249882a139787614de52fbf6fff90d5bf02af12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x460CB 5976 bytes
font_03_sfnt_off0004750c.bin
cbe2db453f6a1ce14a92f7c21020af01b4164dc45b9f994e33687ebef8e0c1d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4750C 18756 bytes
font_04_sfnt_off0004aed6.bin
a76d0ad98d343534eea8bd0c6ae6dde97c2f279ea3efb956b92cafdee58881db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AED6 16972 bytes

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