Malicious PDF — malware analysis report

Static analysis result for SHA-256 2175f510484bff32…

MALICIOUS

PDF

79.5 KB Created: 2021-04-07 04:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6f90ce9531310c9cbb3be92e25a950de SHA-1: c0beaa119b43c5322bb2d0a4b4454a692953e7ff SHA-256: 2175f510484bff326edf9595cd514e0ade2efb8cdc01dda368d4922f28ca8577
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/wix?keyword=weaphones+antiques+apk+cracked PDF link annotation
    • http://kidufamipowanot.mywebcommunity.org/74265733638.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/long_way_down_film_cast.pdfIn PDF document text
    • https://pixufudevolu.weebly.com/uploads/1/3/0/8/130814466/kelibotujana.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/sikavotikigixivuxevafese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_605b5e78b9a29.pdfIn PDF document text
    • https://balebapu.weebly.com/uploads/1/3/5/3/135322653/notirezezapapan-vifijoma-buvowu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406455/normal_60069f6b3b348.pdfIn PDF document text
    • http://vetejula.mypressonline.com/the_business_blockchain_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_606cdc0b4869f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5fe6c2d797d3e.pdfIn PDF document text
    • https://zawawileniweja.weebly.com/uploads/1/3/5/3/135317922/6763571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_4fe5f6d29afe449c9807bd0265fd111e.pdf?index=trueIn PDF document text
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_3b54c9b6329d49cb91b90829e7da05c6.pdf?index=trueIn PDF document text
    • http://jotikovan.rf.gd/headed_paper_template_free.pdfIn PDF document text
    • http://tibutariwu.myartsonline.com/sidajuzitixeropituden.pdfIn PDF document text
    • https://37dcb74a-b492-4e6c-94d7-6984b04a3d7f.filesusr.com/ugd/01eaca_1cd9fa92d4a14a34982952f429ab3cf3.pdf?index=trueIn PDF document text
    • http://selamamoli.epizy.com/39030315504.pdfIn PDF document text
    • http://siwebojik.epizy.com/20784408356.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/xulutubugomuxifuriterizo.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_78b0f9831f01458190513d008bc0c5a2.pdf?index=trueIn PDF document text
    • http://davejizejago.rf.gd/28542208693.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_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 5332 bytes
SHA-256: 9196c0c022febeb511d322de0ffb4b07babdc2ae00a43316227b6167505e7d40
font_01_sfnt_off00010319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10319 14716 bytes
SHA-256: 852d049cb4dd09b75dbda23aaf87fb0657278fc4262771e4d030693631ce762e