Malicious PDF — malware analysis report

Static analysis result for SHA-256 10cee7f7845cbd91…

MALICIOUS

PDF

90.8 KB Created: 2021-01-09 03:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e530756d342f1df8f3248127f7e4c366 SHA-1: f9d97a6c8945ca1f737054fe1ed38218cb086e2d SHA-256: 10cee7f7845cbd9125421dea710c049321e55d4b5ed9490a638f6de9aa757351
234 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirectors or potentially untrusted domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'https://cctraff.ru/square?utm_term=firepower+9300+datasheet', indicating a phishing or malware distribution attempt. The presence of a malformed stream and ML classification further support its malicious nature. No scripts were extracted, but the document's structure and embedded links are designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://cctraff.ru/square?utm_term=firepower+9300+datasheet In PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/pezeduzadawu-xojixig.pdfIn PDF document text
    • https://juvirafiwak.weebly.com/uploads/1/3/4/3/134307718/janugepidomi.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/xupunit_lofuja_tipisup_ragogebawudefuf.pdfIn PDF document text
    • https://kawuzuvom.weebly.com/uploads/1/3/1/3/131379118/webewetar_raxabekiboduzi_bowesubitaf_gojamufutugusof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb46573-9251-413f-9687-cb47d54c6fe3/metodo_montessori_costa_rica.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/information_classification_labelling_and_handling_guidelines_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/effects_of_american_imperialism_in_china.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/alter_ego_2_plus_cahier_d_activits_corrige.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/35074271682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870e2224-36b5-4781-b8f9-239e0585e9f7/54632551546.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/54119903553.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/boiling_point_of_water_lab_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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012dbd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12DBD 27648 bytes
SHA-256: 0dd45946edfaaea29832e1d8affb6e55e409ea4ec2cf87f63d6dacd1c2ce9ec1
font_00_sfnt_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 5524 bytes
SHA-256: fca51cd1534941511ed5909136d83fe6b762da17f329baad3aa19b1dd46b09c8
font_01_sfnt_off0001075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 11212 bytes
SHA-256: f7489035d0901ec621ad2d5bb920a3fa82ea2c4ddd881e90aee66bb5333a5210

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