Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f675cbe755a8b4…

MALICIOUS

PDF

114.1 KB Created: 2021-03-17 23:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 38003ceb9c84dbfa6b1a99c42772de3c SHA-1: acd05e7d76f7fcaa807def0810ef18a93f7908d6 SHA-256: d5f675cbe755a8b44c129042202ec52f3b992ce77e64783d68c284f6d900eea7
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'crophysi.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which is 's3.amazonaws.com/xozeb/black_platform_heels_cheap.pdf'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious links indicates an attempt to redirect the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/award?keyword=anand+sahib+paath+in+punjabi+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5fe696f02b34e.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/77309c.pdfIn PDF document text
    • http://duromexixupa.iblogger.org/cad_cam_software_free_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fca7ede3a00d.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/penas-viraje.pdfIn PDF document text
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/1019617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/xozeb/black_platform_heels_cheap.pdfIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_bcccd4b6e6d04b7ebddf94197dff3b59.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_3ad8c6f0c103404ea47d536e3f35a29d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/impossible_quiz_1_answer_to_number_42.pdfIn PDF document text
    • http://tofarogupa.rf.gd/2331042039.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/79588521623.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_d6c273e87aa444b481687b81c60f3ec0.pdf?index=trueIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_e810b9b0ffca4fcbbf280b9ea81bb2e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/chris_brown_songs_video.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_29b90ed3c87944b49d174894cd7e14df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/unikey_free_full_crack.pdfIn PDF document text
    • http://dokaginiw.epizy.com/pijesexerirebilipu.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/97051435884.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/14176824156.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000157e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E2 5208 bytes
SHA-256: ffa7f3bcd51bd24860c932527caddc159b4c7d0a1533edf6c088ac860b9b1d93
font_01_sfnt_off00016995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16995 3740 bytes
SHA-256: 814992be763021c11dca23fed22b8bb7a0f9688c8b5af2f3d58b36f318d7b63c
font_02_sfnt_off0001750f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1750F 11656 bytes
SHA-256: ad5cdd172cb9ec07c24fdb130edc58cc1c9a839790f4ac85132c542428e012aa
font_03_sfnt_off00019933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19933 9736 bytes
SHA-256: f1c532ad558f6120f05444a72501cb7310940b73984a70d89a22534eb56bfb27