Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c5fb2ffbdcbe00…

MALICIOUS

PDF

72.2 KB Created: 2021-03-28 01:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e78150e0f12da82c7dcea553438b25 SHA-1: ce8307412230b72d2c67e2047acdbb1980d4f4a3 SHA-256: a7c5fb2ffbdcbe00d0a462c8f6e544107d4dc0a538abd6f0cd427717d53381fd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with one pointing to a potentially malicious domain. The presence of embedded URLs further supports the attack pattern of directing users to external, possibly malicious, sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://druttle.ru/123?utm_term=cinta+luar+biasa+cover+della
    • https://cdn.sqhk.co/pazakazagoz/ggdjagh/new_york_company_outlet_memphis_tn.pdf
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/litatejorugodiv.pdf
    • https://cdn-cms.f-static.net/uploads/4473052/normal_602f8a1ede5fc.pdf
    • https://cdn.sqhk.co/mibuguxinise/hdzN3FF/clep_college_algebra_study_guide_with_answers.pdf
    • http://zeboxagekej.sportsontheweb.net/18995123030.pdf
    • https://cdn-cms.f-static.net/uploads/4443617/normal_6029ed892a667.pdf
    • https://cdn.sqhk.co/duloputemab/G7Yghhi/72080035954.pdf
    • https://fefoxotavom.weebly.com/uploads/1/3/5/3/135328849/pafutejusavazusisid.pdf
    • https://cdn-cms.f-static.net/uploads/4465905/normal_602fd42756ecc.pdf
    • http://siwivelijutore.medianewsonline.com/46311543345.pdf
    • https://cdn.sqhk.co/ponesigis/bTLie6C/merriam_webster_dictionary_free_download_for_mac.pdf
    • https://cdn.sqhk.co/mujawiru/kzjjhdB/talking_tom_cat_app_download_for_android_mobile.pdf
    • http://didibemez.scienceontheweb.net/surah_al_waqiah_slideshare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_b4281999e2504c79a72c259329cfabc6.pdf?index=true
    • https://s3.amazonaws.com/zubuwujoxom/49290003023.pdf
    • https://c3e780e1-a1ee-422e-80b3-2bf79490ff1e.filesusr.com/ugd/dc7b26_10f4aff637ed45de9d9d814f93f3e34f.pdf?index=true
    • https://f8bd9030-4518-40b4-9047-d478e6ffc17b.filesusr.com/ugd/608fe2_4f113b13382442f79e69b27fedd67420.pdf?index=true
    • https://s3.amazonaws.com/mamukawaxatali/equifax_credit_report_application.pdf
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_a560f26b444d45d698b67c4f2d13bc57.pdf?index=true
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_34dba278b97144039f081497d843ff01.pdf?index=true
    • https://s3.amazonaws.com/zumezeviwakiz/74389814224.pdf
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd81.bin
80dd96de2ed6711f8e8c3542f5643c3ea24f5f886ce38480fee0fe1f9e1a9b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD81 5036 bytes
font_01_sfnt_off0000eea7.bin
8701d798867aa7b916f91f81f3971bcc03f2b65142f6679639d263e1c1d5d0db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA7 10844 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.