Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2edcbb9db1015c1…

MALICIOUS

PDF

126.0 KB Created: 2020-12-14 02:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 09b6f4d24b3ad78675f7d83c902b0cb1 SHA-1: 35502d0cb573ccc7e0d5a280a1b57c69223cf8b7 SHA-256: e2edcbb9db1015c1e2a07ab19328d3e636931249c824f12353e51b0d78352669
214 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link and a link farm, indicating a phishing or spamming attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests an intent to lure users to malicious websites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffmen.ru/aws?utm_term=articulos+cientificos+ejemplos+pdf In PDF document text
    • https://zasawebisev.weebly.com/uploads/1/3/4/8/134865024/niwotawiza.pdfIn PDF document text
    • https://kagepumesafoke.weebly.com/uploads/1/3/4/8/134846889/d462058f0c.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/kawotexulozax/evidence_of_evolution_worksheet_answers_pearson_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67de515-0970-46c1-b636-37789ffc6f0a/44999918487.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/satofuvez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2778198e-cf33-49de-8945-b30665e0da41/zobinowavedaku.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/acc_men_s_basketball_tournament_2020_dates.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/quints_by_surprise_parents_divorce.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/xuzorovixapisel.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/kuxipudajawalijute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020287d9-d444-4369-aa0a-2fd35aede3e2/proof_of_time_slips.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B171 5156 bytes
SHA-256: 8b2c2ba847403871fe60be2a7dbbea1863def340f1d5dbf554a1f7a415f15d06
font_01_sfnt_off0001c2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2F1 11808 bytes
SHA-256: 73a5c603f501e93a08817d3cd2eaf6926e97a27eaa50c7bca4a43d943be51351

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