Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cb609eed7d010f…

MALICIOUS

PDF

211.8 KB Created: 2021-02-04 11:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f4a130153cd19002715803a23ba230ca SHA-1: 493ae1f4cd6165883e9a8435bab825a430a1cb70 SHA-256: 85cb609eed7d010fa165b593c9e656e74fc3328b56cf215d90164675e625a558
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an embedded URI pointing to 'https://baarspo.ru/123?utm_term=creme+savers+candy+walmart', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL and the detection signatures strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=creme+savers+candy+walmart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414871/normal_5fd06fd012ac9.pdfIn PDF document text
    • http://tehnopolis.org/vita_fighters_vpkr2c6t.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/zawozokenunirekezep.pdfIn PDF document text
    • http://jofised.iblogger.org/bhojpuri_album_ka_gana_video_hd_ing.pdfIn PDF document text
    • http://yewes.fun/53805428346zljhd.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/xekizuwuxunjfyt.pdfIn PDF document text
    • http://masterpowerpoint.com/ritevegetoriwnu2k.pdfIn PDF document text
    • http://wuvuzijime.22web.org/13858022217.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/dalufagonojuvabizogoxaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dilalixurapa.epizy.com/93573781933.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/84525227282.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/scribblenauts_showdown_trophy_guide.pdfIn PDF document text
    • http://suredutika.rf.gd/94246763599.pdfIn PDF document text
    • http://tipopetudigovib.epizy.com/university_graduate_cv_template.pdfIn PDF document text
    • http://pakilapawunafep.epizy.com/reflector_telescope_buying_guide.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/wakakelujesomowepawilev.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_off0002ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC91 5244 bytes
SHA-256: 6033858cd64d3fa8287e7c6f52fec1fc24b5b4b7e98d345c4df094f119582f42
font_01_sfnt_off0002fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE62 13596 bytes
SHA-256: 866017702d0e3c1b3ac45a3f16f30d885e56a4d38b8388d156872701fa414f8b
font_02_sfnt_off00032ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BA6 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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