Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a096e7914e64ff3…

MALICIOUS

PDF

74.1 KB Created: 2021-03-20 00:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01fb1aaa6f0ce6556e82e2800262e155 SHA-1: 2c4b2752f35d7f2bce0ab0643d86da858ae98524 SHA-256: 2a096e7914e64ff32c79deefc7ab96ec77f62c925e0b520eccf2dc3e54f9c819
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though corrupted, contains text related to 'Assassin's Creed 2 trainer', suggesting a lure. The presence of a large number of external PDF links and a critical heuristic firing for malicious redirector links indicates a phishing or content-farming attack. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://yafferge.ru/123?utm_term=assassin%2527+s+creed+2+trainer++pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fdb58322b766.pdfIn PDF document text
    • http://kind-insta.site/energy_and_matter_flow_in_an_ecosystemy1ynz.pdfIn PDF document text
    • http://mebelintera.ru/resiriperozimexohravq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_600f815e8b0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_602a455d7267d.pdfIn PDF document text
    • http://wapuwesifatirok.iblogger.org/mafepukuxurofarokav.pdfIn PDF document text
    • http://4338bacchus.com/59628160465tnbkk.pdfIn PDF document text
    • http://olymp-trade.top/did_jacob_kill_the_boy_in_defending_jacobfuzg5.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/varolexexus/risk_assessment_template_nsw_childcare.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/mufasudunizesiba.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_05b5e628fac4438fba76f25a4e2624a5.pdf?index=trueIn PDF document text
    • http://dukedofabi.epizy.com/56022809673.pdfIn PDF document text
    • https://377d1c6c-8747-407e-9a0d-bb8234813250.filesusr.com/ugd/f0b1fd_9fdbf4c5992a4c5da1514019133bbd09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/how_did_betty_g_miller_became_famous.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_22b401c7ce1a4410acb382080dc32fd2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/king_platform_bed_wood_headboard.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_b6673256ccb64cb8bcf66740acbfbd53.pdf?index=trueIn PDF document text
    • http://podemerobetalax.epizy.com/69345415468.pdfIn PDF document text
    • http://wifapejaxim.rf.gd/tamil_boy_baby_names_with_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/backache_exercises.pdfIn PDF document text
    • http://zafaxomerav.epizy.com/secure_folder_apk_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/48229493294.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/11568852150.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_off0000e46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46E 5192 bytes
SHA-256: 56cb5942d03ec5931f590da0c9d2fdd19c3dab90b63e542f4b50a3be966e66b7
font_01_sfnt_off0000f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 11096 bytes
SHA-256: 5980a19813811ae2b7113126902082e769dbc279f9f2f2f3b0e1323e2e414649

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